Brooks glycerin 21

Learn more about the Brooks glycerin 21 female running shoes, including key features, performance, reviews, model updates, and more.

Brooks glycerin 21

Price

$329

Rating

High

Popularity

Very Popular

The Brooks Glycerin 21 is a high-cushioned neutral running shoe designed for maximum comfort, sitting at the top end of the Brooks lineup along with models like the Ghost for those who prioritize plush cushioning and a smooth ride.

10 colorways

Colorway: COCONUT/AQUA/AUTUMN SUN

Widths available: normal, wide

Summary

The Brooks Glycerin 21 is a premium cushioned running shoe designed for comfort and support over long distances. It features Brooks' DNA LOFT midsole cushioning for a plush and responsive feel, as well as an OrthoLite sockliner for additional comfort. Positioned within Brooks's lineup of running shoes, the Glycerin 21 is ideal for neutral runners seeking maximum cushioning. Compared to other models like the Brooks Ghost, the Glycerin 21 offers a softer, more luxurious ride due to its enhanced cushioning system. It sits above models like the Brooks Adrenaline GTS, which provides more structured support, catering to those who need stability. Overall, the Glycerin 21 is tailored for runners who prioritize plush comfort and a smooth running experience.

Surface

road

Cushioning

MinLowMediumHighMax(31mm)

Breathability

LowMediumHigh(double jacquard mesh upper)

Weight

286g

Heel-to-Toe Drop

10mm0mm14mm

Support

NeutralLightHigh

Width options

normal, wide

Grip

LowMediumHighMax

Suitability

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Pros & Cons

AI-powered

Fittir conducts a detailed analysis of the Brooks glycerin 21 to provide you with a comprehensive overview of the shoes features, pros, and cons based on 59 wear-tester reviews.

Summary: The Brooks Glycerin 21 is widely praised for its exceptional cushioning, comfort, and improved fit, making it an excellent choice for daily training and long-distance runs, particularly for neutral runners. However, it may not be the best option for speed-focused workouts or those seeking significant stability, as it tends to lack responsiveness and can feel warm during use..

Most Mentioned Pros

Most Mentioned Cons

cushion
Cushion feeling: Firm

The main concerns about the shoe's cushioning are that it often feels firmer than expected, which may not suit those looking for a softer, more plush experience.

comfort (11)

firmness (9)

softness (6)

responsiveness (5)

foam (5)

midsole (4)

max (3)

stack (2)

Pros

"The Glycerin 21 features enhanced nitrogen-infused cushioning that provides a plush feel with better support."

cushioning

plush

DNA LOFT

"The Glycerin 21 features an extra layer of soft cushioning for enhanced comfort during runs."

cushioning

DNA Loft

comfort

"The cushioning provided by the nitrogen-infused DNA LOFT v3 is described as incredibly comfortable without being overly squishy."

soft

comfort

"The Glycerin 21 maintains a balanced midsole softness suitable for a variety of runners."

midsole

softness

comfort

"The DNA Loft V3 midsole offers an improved cushioned experience."

DNA Loft V3

cushioning

softness

"The Glycerin 21 provides a noticeably softer ride compared to its predecessor."

softness

midsole

comparison

"The Brooks Glycerin 21 features exceptionally soft cushioning which enhances the comfort during runs."

cushioning

comfort

soft feel

"The new DNA Loft version 3 offers improved softness and springiness."

foam

softness

springiness

"The Brooks Glycerin 21 features an enhanced nitrogen-infused DNA Loft V3 cushioning technology for a softer and more plush feel."

cushioning

soft feel

nitrogen-infused

"The shoe offers exceptional softness and comfort for longer runs."

softness

comfort

long runs

"The shoe features an added 2 mm of DNA Loft V3 cushion for improved comfort."

DNA Loft V3

cushion

soft ride

smoother ride

"The cushioning in the Brooks Glycerin 21 is exceptionally soft and comfortable, improving the overall running experience."

cushioning

midsole

comfort

"The neutral version provides extra cushioning for comfort during runs."

cushioning

comfort

"The midsole of the A6 GEL Nimbus 26 is noted for its plush softness, making it ideal for recovery runs."

plush ride

soft midsole

cushioning

"The Glycerin 21 features enhanced plush cushioning due to the added loft nitrogen injected foam."

plush

cushioning

foam

"The updated DNA Loft V3 midsole provides a softer feel compared to previous versions."

midsole

DNA Loft V3

"The shoe provides just enough softness for a comfortable running experience, especially for longer runs."

softness

long runs

"The Glycerin 21 features an incredibly soft cushion technology, enhancing the overall running experience."

cushioning

comfort

running experience

"The Brooks Glycerin 21 has improved cushioning compared to the Glycerin 20, making it feel softer underfoot."

cushioning

comfort

"The cushioning provides a great balance of being soft yet supportive, enhancing overall comfort during runs."

support

comfort

high cushion

"The Glycerin 21 features a 2 mm increase in stack height leading to enhanced cushioning."

cushioning

plusher ride

height increase

"The additional 2 mm stack in the shoe enhances cushioning."

cushioning

stack height

improvement

"The shoe provides a luxurious and plush ride with good energy return."

plush

bounce

softness

"The midsole design provides a plush ride while maintaining a degree of responsiveness."

plush

bounce back

comfort

"The shoe provides a cushioned yet responsive ride, allowing for a comfortable running experience."

cushioned

responsive

"The foam used provides a plush cushion ride along with responsiveness for better energy return."

DNA Loft

plush

energy return

"The shoe maintains a good balance of cushioning without feeling overly mushy, which supports a responsive run."

bounce

support

performance

"The shoe has a responsive, yet soft feel which enhances the running experience."

Nitro foam

responsive

cushioning

"The midsole foam provides a good balance of protection without being too firm or too soft."

protection

stability

"The Brooks Glycerin 21 offers a soft and cushioned experience, balancing comfort and performance."

softness

cushioning

performance

"The Brooks Glycerin 21 features an enhanced DNA Loft v3 cushioning system for improved comfort."

DNA Loft v3

cushioning

out-of-the-box comfort

"The cushioning in the Glycerin 21 is plush and enhances comfort during runs."

cushioning

comfortable

long-distance

"The shoe has improved cushioning that enhances comfort during long runs."

cushioning

comfort

protection

"The Brooks Glycerin 21 offers super soft cushioning that enhances comfort during runs."

cushion

softness

comfort

"The glycerin 21 is noted for its exceptional cushioning, ideal for long-distance runs."

max cushion

long distance

soft

daily trainer

"The shoe provides a plush and enjoyable underfoot experience thanks to its improved midsole foam."

DNA Loft V3

enjoyable

soft

"The cushion provided in these shoes enhances comfort during runs."

softness

impact reduction

"The cushioning in the Brooks Ghost Max is designed to provide ample comfort, especially during longer runs."

cushioning

protection

stability

"The shoe's midsole is made from a soft, nitrogen infused foam designed for daily training."

soft foam

daily trainer

nitrogen infused

"The updated midsole has a softer feel compared to previous models, enhancing comfort during runs."

softness

comfort

midsole

"The shoe provides excellent cushioning for a comfortable run."

cushioning

softness

bounce

"The DNA LOFT v3 foam offers an enjoyable squish-to-bounce ratio for a smooth ride."

balance

responsive

soft

"The supercritical midsole design enhances the overall running experience with balance and energy return."

midsole

energy

comfort

"The midsole cushioning has been improved and is well-suited for longer runs and recovery miles."

DNA Loft V3

comfort

daily training

"Both the Ghost 16 and Glycerin 21 demonstrate excellent cushioning, making them suitable for daily training."

DNA Loft V3

comfortable

plush

"The Glycerin 21 features enhanced cushioning that improves overall comfort during runs."

cushioning

comfort

performance

"The cushioning technology used in the Glycerin 21 offers a bouncier ride compared to previous models, enhancing comfort."

bounciness

cushion technology

DNA Loft

"The shoes are equipped with a Nitrogen infused midsole that enhances durability and provides a bouncy feel."

cushion

durability

nitrogen_infusion

"The DNA Loft v3 technology provides a unique balance of softness and firmness for various activities."

DNA Loft

softness

firmness

"Both shoes use the same advanced foam technology which enhances comfort and reduces weight."

DNA Loft V3

nitrogen infused

lightweight

"The shoes provide excellent cushioning while maintaining a firm feel that aids in shock absorption during runs."

cushion

firm

shock_absorption

"The midsole material, DNA Loft V3, provides effective shock absorption and comfort during runs."

DNA Loft V3

shock absorption

softness

"The Glycerin 21's midsole features Brooks' DNA Loft v3 foam which offers significant cushioning."

DNA Loft

cushioning

softness

"The updated foam provides a moderately soft feel, allowing for comfortable runs while not feeling overly bouncy or firm."

foam

cushioning

comfort

"The DNA LOF V3 foam in the Brooks Glycerin 21 provides a solid daily training experience."

DNA LOF V3

daily trainer

"The new DNA Loft V3 foam in the Ghost 16 provides a softer and more enjoyable underfoot experience."

DNA Loft V3

softness

Midsole

"Both shoes use Brooks' new DNA Loft V3 foam for excellent cushioning."

cushioning

DNA Loft V3

comfort

"The midsole delivers reliable shock absorption during long runs without feeling overly restrictive."

shock absorption

comfort

"An added two millimeters of DNA Loft v3 foam improves the overall cushioning of the shoe."

DNA Loft

extra foam

cushion improvement

"The new midsole has improved cushioning with an additional 2 mm thickness compared to its predecessor."

midsole

cushioning improvement

"The shoe is equipped with ample cushioning for a plush sensation."

padding

plush

comfort

"The Brooks Glycerin 21 provides ample cushioning for long runs."

cushioning

long runs

"The Brooks Glycerin 21 has significantly improved cushioning that offers a comfortable ride for daily runs."

cushioning

comfort

daily runs

"The heel cushioning is particularly noted as being very good, enhancing the overall comfort."

heel comfort

cushioning

"The increased midsole stack enhances cushioning and protection."

midsole

DNA Loft V3

cushioning

"The cushioning in the Glycerin 21 is plush and offers great comfort for long runs."

comfort

long run

cushion

midsole

"The Glycerin model features additional foam for a more plush and soft experience."

Glycerin

extra foam

softness

"The Brooks Glycerin 21 offers a plush level of cushioning, making it ideal for comfort and protection during runs."

cushioning

comfort

protection

"The midsole has been updated to include 2 mm of extra foam, enhancing cushioning."

midsole

cushioning

enhancement

"The Glycerin Max uses new DNA tuned foam which improves overall comfort and ride quality."

new foam

improved comfort

"Both shoes provide ample cushioning, suitable for long-distance runs."

long-distance

cushioning

"The Brooks Glycerin 21 features a lightweight design despite its substantial appearance."

lightweight

design

"The Glycerin 21 offers enhanced cushioning with an increased stack height compared to its predecessors."

max cushion

stack height

"The glycerin 21 features increased stack height for enhanced cushioning without a significant weight increase."

stack height

lightweight

cushion

"The midsole's stack height has been increased for improved comfort."

stack height

comfort

"Increased stack height contributes to improved cushioning."

cushioning

stack height

improvements

"This shoe features a medium stack height which provides a balanced feel."

medium

height

balance

"The Glycerin 21 features enhanced cushioning for improved comfort."

cushioning

comfort

midsole

"The new model features a noticeable increase in stack height, providing better overall support and cushioning."

stack height

cushioning

support

"The Glycerin 21 features an increased stack height for improved cushioning."

cushioning

stack height

"Both the Brooks Ghost Max 2 and the Glycerin 21 provide excellent cushioning for daily training."

cushioning

daily trainer

max cushion

"The Brooks Glycerin 21 offers excellent cushioning that enhances comfort during runs."

cushioning

comfort

max cushion

"The Brooks Glycerin 21 features max cushioning for enhanced comfort during runs."

cushioning

comfort

DNA Loft foam

"The Brooks Ghost Max 2 is heavier but offers a more cushioned experience."

cushioning

heavier

"DNA Loft version 3 foam offers a cushy feel for running."

cushioning

foam technology

"The Ghost 16 features an impressive stack height, providing a cushioned running experience."

cushioning

heel height

drop

"The Glycerin 21 offers excellent cushioning thanks to its higher stack height."

cushioning

stack height

comfort

"Brooks Glycerin 21 provides a solid bounce for a max cushioned shoe."

solid bounce

max support

stable cushioning

"The Brooks Glycerin 21 offers excellent cushioning, making it a solid choice for comfortable long runs."

long runs

cushioning

"The Glycerin 21 provides a comfortable run with ample cushioning."

cushioning

comfort

long runs

"The DNA Loft version 3 foam provides a better ride."

DNA Loft

ride quality

foam

"The shoe offers ample cushioning in the heel."

foam

heel

cushioning

"The nitrogen-infused DNA Loft V3 material offers responsive cushioning."

DNA Loft V3

nitrogen infused

responsive

"The Brooks Glycerin 21 is a premium daily trainer with a luxurious feel and ample cushioning."

premium

cushioning

daily training

"The Brooks Glycerin 21 offers substantial cushioning for a comfortable running experience."

cushioning

comfort

"The shoe uses DNA Loft foam which adds responsiveness."

responsive

DNA Loft

cushioning

"The Triumph 21 features a balanced foam that feels soft while still providing good energy return."

softness

energy return

"There is a pleasant energy return experience with the updated midsole, which adds enjoyment while running."

energy return

enjoyment

"The Sockony Triumph 21 provides a cushioned daily trainer option that excels on easy and long runs."

cushioned

daily use

"The Glycerin 21 offers a substantial amount of cushioning, making it ideal for longer runs."

cushioning

long runs

"The shoe offers a good balance of cushioning and rebound, improving responsiveness during runs."

responsiveness

cushioning

bounce

Cons

"The shoe has a relatively firm feel compared to other high-cushion options."

cushion

firmness

"Not ideal for runners who prefer firmer cushioning."

soft

responsiveness

cushioning

"The shoe still feels relatively firm despite the improvements."

softness

springiness

cushioning

"Glycerin 21 feels firmer at the heel."

stiffness

heel

"The shoe feels a bit firm despite being a max cushion version."

max cushion

firm feel

"The DNA Loft 3 foam feels firm rather than soft, which may not suit every runner's preference."

firm

comfort

"The shoe may not provide excessive cushioning for those who prefer a softer feel."

cushioning

not plush enough

"The shoe feels firmer than expected for a max cushion shoe, which might disappoint users seeking maximum softness."

cushioning

comfort

firmness

"The shoe's cushioning becomes firmer while running, which may not suit everyone's preference."

cushioning

running experience

"The Glycerin 21 may feel too soft for those seeking a responsive ride."

soft

lack of responsiveness

"The shoe may be too soft for those seeking responsiveness."

softness

bounce

"The shoe may feel too soft for some runners, lacking in responsiveness."

softness

comfort

cushioning

"The ride isn’t as soft or responsive as some runners might prefer in a max cushioned shoe."

cushioning

firmness

"Runners looking for more responsiveness might find it lacking due to the soft cushioning."

responsiveness

cushioning

"Runners may feel the extra soft cushioning is not suitable for more demanding runs."

softness

not for demanding runs

"Even with an increase in cushioning, it may not feel as squishy as competitors."

cushioning

softness

comparison

"The cushioning is not as soft as advertised compared to competitors."

advertising

comparison

"The shoes may feel too firm initially, which might not suit all runners' preferences."

firmness

initial feel

"The Glycerin 21 is firmer compared to previous models, lacking the advertised super soft cushioning."

cushioning

firmness

"The shoe may not provide the plush feel that some runners expect from a Max cushioned option."

max cushion

comfort

soft feel

"The midsole may be too soft for some runners, potentially leading to discomfort on longer runs."

soft

cushioning

discomfort

"The cushioning may feel too soft for some runners."

cushioning

softness

"The cushioning does not compress much during runs, which may affect the overall feel for some runners."

cushioning

comfort

"The shoe feels more like a max cushion shoe, which could be limiting for speed work."

max cushion

softness

speed

"The cushioning is not as responsive as expected and lacks bounce."

cushion

soft

bounce

"There is a noticeable height increase that may feel unusual for some runners."

tall feel

stack height adjustment

"The Brooks Glycerin 21 has a lower stack height, which may not provide enough cushioning for some runners."

less cushion

lower stack

"The review lacks any mention of specific negatives regarding cushioning."

"Ghost 16 offers a more moderate cushioning experience, potentially lacking for runners seeking maximum cushioning."

cushioning

comfort

versatility

"Runners looking for more extreme cushioning might find this shoe lacking."

max cushion

plush feel

"The overall cushioning in the Ghost 16 is firmer and less plush compared to the Glycerin 21."

firm cushioning

less plush

"The midsole is not as soft and squishy as some might expect, affecting the first feel on foot."

midsole

cushioning

first feel

"The midsole of the GEL Nimbus 26 is described as being softer than the Glycerin 21, which might not appeal to every runner's preference."

soft ride

not plush

"The PowerRun Plus foam in the Triumph 21 is described as dense with less energy return compared to the DNA Loft V3 foam in the Glycerin 21."

PowerRun Plus

density

long runs

comfort
Breathability: Less breathable

The main issues with comfort in these shoes are that many reviewers noted limited breathability, especially in warmer conditions, and some found the tongue padding excessive or the shoe too stiff, which could lead to discomfort during longer runs.

breathability (13)

upper (7)

collar (4)

padding (3)

plushness (3)

temperature (3)

tongue (2)

step-in (2)

Pros

"There is a plush tongue that adds to the comfort while preventing tightness in the shoe's fit."

plush

no tightness

"Reviewers appreciate the breathable and structured design of the upper, contributing to overall comfort."

breathability

comfort

structure

"The improved design includes a breathable engineered mesh upper for comfort during runs."

breathable

comfort

"The engineered mesh upper of the Ghost Max 2 allows for better breathability compared to the Glycerin 21."

breathable

comfort

"The upper of the Ghost is highly breathable compared to other models, enhancing comfort during runs."

breathability

comfortable

"The new warp knit upper provides breathability and flexibility."

breathable

flexible

upper material

"The new upper design in both shoes enhances breathability, adding to overall comfort during runs."

upper design

fit

"There are large ventilation zones in the toe box, contributing to breathability and comfort during runs."

ventilation

comfort

"The upper material of the Brooks Glycerin 21 is flexible and breathable, contributing to overall comfort."

upper material

flexibility

comfort

"The Glycerin Stealthfit 21 is noted for its extreme comfort."

comfortable

casual use

"It offers a comfortable ride with enough cushioning for long daily training runs."

comfortable

cushioned

daily trainer

"The overall comfort of the shoe is noteworthy, making long runs enjoyable."

comfort

long runs

cloud-like

"It features deluxe plush materials and a well-padded tongue for added comfort."

plush

padded

"The shoe includes a traditional feel that contributes to its overall comfort and ease of use."

traditional

easy use

"The shoe provides a plush and premium feel, especially around the heel collar."

heel collar

premium feel

wider platform

"The shoe features a soft and luxurious warp knit upper that balances comfort and security."

soft

supportive

breathable

"The Glycerin 21 prioritizes upper comfort with a padded collar and stout heel counter."

padding

heel counter

fit

"The breathable mesh upper contributes to comfort."

mesh

breathability

comfort

"The shoe's upper design provides a comfortable and secure fit around the heel, enhancing overall comfort during runs."

heel comfort

secure fit

"The upper of the shoe has been tweaked for better comfort."

upper design

comfort

fit

"The shoe features a comfortable upper that enhances overall running experience."

comfort

lockdown

padded

"The upper material feels soft and well-constructed."

soft

material quality

"The shoe features excellent tongue padding, enhancing comfort for runners who prefer a snug fit."

comfort

padding

fit

"The Glycerin 21 enhances comfort with its luxuriously padded upper and smooth lining."

comfort

soft upper

luxurious

"This shoe maintains a good level of comfort with ample plush padding, especially in the heel area."

plush

heel padding

overall comfort

"The upper of the Glycerin 21 is luxuriously padded, adding to overall comfort during runs."

comfort

upper

padded

"The Glycerin 21 is also recognized for its extreme comfort due to its plush padding."

comfort

plush padding

Brooks Glycerin 21

"The shoe features a plush padded tongue which enhances comfort."

tongue

padding

"The shoe has a plush and padded upper that enhances comfort."

plush

comfortable

upper

"The shoe provides a comfortable experience for both walking and running."

comfort

walking

running

"The plush feel underfoot provides smooth sensations while running, making it enjoyable for long runs."

comfort

smooth

running experience

"Both shoes have a plush, comfortable upper that ensures a good fit."

plush upper

comfort

"There is a plush feeling around the collar of the shoe which enhances comfort during runs."

collar

comfort

sensitivity

"The shoe is versatile enough to be a good walking shoe as well as a running shoe."

walking

running

multi-purpose

"Step-in comfort is consistent with previous models, providing a plush feeling."

step-in

plush

familiarity

"The shoe offers ample cushioning for heel strikers, making it suitable for various running styles."

heel_strikers

cushioning

versatility

"The Brooks Glycerin 21 offers exceptional comfort with its plush DNA Loft cushioning."

comfort

cushioning

smooth ride

"The Glycerin 21 offers exceptional step-in comfort making it an ideal shoe for long training runs."

comfort

soft

cushioned

"The Glycerin 21 is designed for high comfort even during prolonged use, preventing discomfort and fatigue during longer runs."

long_runs

comfort

fatigue_prevention

"The shoe provides a plush and well-wrapped fit due to its warp knit upper."

knit material

fit

lockdown

"The shoe provides a smooth and comfortable ride for daily runs."

comfort

daily_running

wearability

"There is good step-in comfort right from the start with a hugging feel."

step-in comfort

hugging feel

plush padding

"The shoe feels incredibly soft and comfortable when walking around."

softness

comfortable

"The cushioning and support features of the GTS model reportedly ease pressure on joints during runs."

comfort

support

"The uppers of both shoes provide a soft and plush feel, enhancing overall comfort."

plush

soft upper

comfortable

"The upper warp net material allows for excellent ventilation."

warp net

breathability

ventilation

"Both shoes are reported to have a good level of padding in the heel, enhancing comfort during runs."

padding

heel comfort

overall comfort

"The shoes feature a soft lining that enhances comfort when wearing them."

soft

comfort

"The shoe maintains comfort with a firm ride without being overly soft."

comfort

firmness

not mushy

"The Glycerin offers a softer feel and smoother ride, making it more enjoyable for longer runs."

soft

smooth

long runs

"The Nimbus 26 provides an exceptionally soft and comfortable ride, described as cloudlike and pillowy."

comfort

soft

Nimbus 26

"The heel collar provides exceptional comfort, acting like a pillow around the heel without causing slip."

plush heel

comfort

no heel slip

"The increased stack height enhances the plush feel and overall comfort right from the first wear."

plush

comfort

"The Brooks Glycerin 21 features a plush heel collar that enhances comfort during runs."

plush collar

comfort

heel support

"The A6 GEL Nimbus 26 features a well-designed heel collar that grips the ankle comfortably."

ankle grip

comfort

heel support

"The shoe's comfort collar adds a plush feel around the ankle, enhancing overall comfort."

anxiety

comfort

collar

"The plush hill collar and tongue enhance comfort."

plush

comfortable

"A softer sandwich air mesh upper offers luxurious comfort and feel on the foot."

mesh

comfort

upper

"The stealth fit version makes it very convenient for runners to put on and take off quickly."

easy to wear

comfort

"The Glycerin 21 is described as a more fun shoe to run in compared to the Glycerin 20, enhancing the running experience."

fun

running experience

"Both shoes provide a very comfortable fit around the ankle, offering a plush feel that enhances the overall comfort."

plush

comfortable

step-in feel

"The shoe has a cushioned heel that provides comfort for heel strikers, making it a better option for those who prefer a stiff heel counter."

stiff heel counter

cushioned heel

comfort

"The upper material is plush, contributing to overall comfort during runs."

upper material

comfort

plush

Cons

"The upper material retains heat, making it very warm during runs."

heat

comfort

"Breathability is limited due to the thick knit upper, making it unsuitable for warm weather."

ventilation

warmth

"The upper lacks some breathability compared to the previous version."

breathability

upper

"The new upper material reduces breathability compared to previous models."

breathability

comfort

design

"The upper may cause discomfort in warmer weather due to lack of breathability."

heat

upper

comfort

"Breathability of the stealth fit version is not as good as the original version."

breathability

upper

"The shoe may not provide enough breathability for long runs."

breathability

long runs

"Breathability is superior in the Glycerin compared to the Ghost."

breathability

mesh

comfort

"There's limited breathability, which may lead to overheating in warmer conditions."

warmth

breathability

"Both shoes lack sufficient breathability, leading to discomfort during longer runs."

breathability

heat

comfort

"The breathability of the knit upper is average, limiting comfort during longer runs."

breathability

knit material

comfort

"The upper is not very breathable which may lead to discomfort during hot weather."

mesh

heat

humidity

"The Brooks Ghost 16 lacks breathability."

heat

comfort

breathability

"The tongue padding might be excessive, which could lead to unnecessary bulk."

bulkiness

padding

"The tongue of the shoe might be too thick for some runners leading to possible discomfort."

tongue

comfort

"Though there's an excess of padding, it may not suit everyone's preference."

excess padding

comfort level

"The upper is on the warmer side, which may impact comfort during longer runs."

upper

warm

comfort

"The warm upper of both shoes may cause discomfort in hotter conditions."

thick upper

heat

"The shoe is stiff at the start, requiring a break-in period that may be inconvenient for some runners."

break-in period

stiffness

"The tongue design is inadequate, leading to comfort and fit issues."

tongue

gusseted

comfort

"The shoe may be too bulky for runners who prefer a lighter feel."

heavy

personal preference

bulk

"The Brooks Ghost Max 2 feels chunkier, which may not be suitable for everyone."

chunky

heavy

feel

"While the upper is padded, it is also reported to be extremely warm during runs."

comfort

warmth

"The traditional upper can be too warm, especially in hot conditions."

warmth

upper material

"The shoe is still considered warm, similar to its predecessor."

warmth

breathability

"The design of the heel counter may irritate."

irritation

design

"Tongue bulging in Glycerin Max could cause discomfort."

bulging

fit

"The knit fabric used in the stealth fit version lacks elasticity, which may not be optimal for some runners."

material

knit

"The review lacks attention to long-distance comfort over time."

comfort

endurance

"The review does not specify any comfort issues despite mentioning the shoes are comfortable."

"The increased stack height might not suit all runners' preferences."

stack height

preference

"The tongue of the Ghost 16 causes irritation due to excess fabric."

irritation

comfort

tongue

"The shoe's tongue is not gusseted, which could affect comfort during runs."

gusseted

comfort

"The Ghost 16 has less padding in the heel counter compared to the Glycerin."

heel counter

padding

stiffness

"Although the shoe is comfortable, it does not provide a significant change from its predecessor."

comfort

similar design

"The insole is described as average with no additional cushioning compared to competitors."

insole

cushioning

average

"The Glycerin 21 generally feels more accommodating and comfortable for longer runs than the Ghost 16."

comfort

accommodating

"The Ghost 16 may not provide sufficient comfort during longer distances due to its firmer feel."

long distance

firm feel

"The heel counter of the Glycerin 21, while rigid, is not preferred over the Nimbus 26, suggesting a potential comfort issue."

rigid

comfort preference

"The stiff heel counter may be uncomfortable for those sensitive to rigid structures in shoes."

comfort

heel counter

"The Brooks Glycerin 21 feels firmer than the Triumph 21, which may detract from comfort over longer distances."

firmness

long runs

comfort

"The older model might feel firmer, which some runners may find less enjoyable."

firm

ride

"The lacing system can create moderate lace pressure which affects comfort."

lacing

pressure

comfort

"The differences in midsoles might take some time to get used to and feel different for runners transitioning from the previous model."

transition

adaptation

"The knit upper of the Glycerin 21 may run warmer."

warmth

upper

material

"Both shoes may feel overloaded in warmer conditions."

overheating

weather

comfort

"The shoe may feel somewhat stiff for those accustomed to more flexible footwear."

comfort

flexibility

durability

The main points to note are that durability is frequently highlighted as a strong feature of the shoes, but there are also significant concerns about the outsole's rubber thickness potentially compromising durability over time.

outsole (5)

construction (2)

weight (2)

lightweight (2)

workhorse (1)

minimal wear (1)

materials (1)

longevity (1)

Pros

"The build quality of the Glycerin 21 is durable, showing little wear even after extensive usage."

durability

wear resistance

"Durability is a strong point for both shoes, indicating they are designed to withstand regular use."

rubber

durability

wear-resistance

"The shoe is lightweight despite the increased midsole height, making it easier to run."

lightweight

efficiency

"The shoe is lighter than previous models despite the increased cushioning."

lightweight

performance

"The weight difference between the two shoes is minimal, making both options fairly lightweight for their category."

lightweight

similar weight

"The robust outsole provides exceptional durability and support for long-distance running."

outsole

durability

performance

"The shoes are built to last with a durable outsole that withstands various running surfaces."

durability

outsole

lasting

"The updated outsole design enhances flexibility while maintaining durability, even with heavy use."

flexibility

durability

traction

"The overall durability of the outsole shows promise, as it showed no signs of wear after initial use."

durability

rubber

longevity

"The outsole offers durability and good ground contact for various surfaces."

durability

outsole

mileage

"The grip and durability of the outsoles on both shoes are excellent, providing support during runs."

excellent outsoles

durability

"The outsole uses durable materials which extend the shoe's life and improve grip."

rubber coverage

durability

grip

"The new Road Track outsole enhances the shoe's durability significantly."

durable

Road Track

improvements

"Both shoes exhibit excellent durability with plenty of rubber coverage on the outsoles."

durability

rubber coverage

"Brooks has utilized durable rubber in the outsole, indicating long-lasting wear."

durable

long-lasting

rubber

"The Glycerin 21 has a strong outsole, ensuring durability for high mileage running."

durability

high mileage

reliability

"The Glycerin 21 offers good durability with a thick rubber outsole."

durable

thick rubber

"The outsole is durable due to the extensive use of rubber."

durability

outsole material

"The shoe provides a durable option for high mileage training."

durability

high mileage

training

"The shoe shows excellent durability, with minimal wear even after extensive use."

durability

long distance

outsole

"The dual formed rubber outsole enhances durability and lightness."

durable

lightweight

"Users can expect good longevity and durability from the shoe."

durability

long-lasting

good structure

"These shoes are durable and hold up well over time."

durable

long-lasting

wear-resistance

"The construction quality of the shoe is impressive and indicates durability."

construction

quality control

durability

"The durability of both shoes is impressive, allowing for plenty of running time without wear."

durability

long-lasting

"The Brooks Glycerin 21 is lighter than the Asics Nimbus 26, making it feel more nimble."

lightweight

nimble

Brooks Glycerin 21

"The shoe is surprisingly lightweight considering its cushioning and structure."

lightweight

cushioning

surprising

"The durability of the Brooks Glycerin 21 is emphasized as it lasts a long time, making it a reliable choice."

long-lasting

reliable

workhorse

"Although there is less rubber on the outsole, the shoe remains durable thanks to the quality of the midsole foam."

outsole

midsole

"The shoe offers good rubber coverage in the outsole, contributing to long-lasting durability."

outsole

durability

"The foam used in both models is resilient, providing a consistent ride across different terrains."

foam

durability

consistent

Cons

"There's a concern that with less rubber on the outsole, durability may be compromised in the long run."

less rubber

durability

outsole

"The outsole's rubber compounds might not offer the expected durability."

durability

rubber

"There is less rubber on the outsole, which might affect durability."

outsole

durability

material

"The outsole of the GEL Nimbus 26 is criticized for being thinner and possibly less durable compared to the Glycerin 21."

thin rubber

durability issues

"The outsole provides a classic feel but lacks significant advancements in durability."

outsole

durability

classic

"The outsole's lower durability may lead to quicker wear, especially under heavy use."

outsole

soft rubber

"There are concerns about the durability of the shoe after high mileage runs."

durability

mileage

performance

"The review doesn't mention any specific durability concerns."

"The shoe is on the heavier side, which could be a concern for some runners."

heavy

weight

"The weight of the shoe may still be a concern for runners seeking ultralight options."

weight

lightness

performance
Distance suited: Long (>20km)
Rocker: Less rocker

The main concerns with the Glycerin 21 are its lack of responsiveness and speed, as many users feel it is better suited for easy runs rather than faster-paced workouts.

speed (12)

responsiveness (9)

versatility (6)

weight (5)

lightweight (3)

geometry (3)

energy_return (3)

transitions (2)

Pros

"The Glycerin 21 is lightweight for its level of cushioning, allowing for fast turnover."

lightweight

fast turnover

"The Glycerin 21 is surprisingly lightweight for a cushioned shoe, making it suitable for various running paces."

performance

lightweight

cushioning

"The shoe is lighter compared to its predecessor, which helps with performance during runs."

lighter

performance

run efficiency

"The shoe performs well on uneven and clumped gravel surfaces, offering a stable ride."

gravel

stability

"The shoe is designed for long-distance running, providing comfort and reducing fatigue over extended runs."

long-distance

resilient midsole

energy-saving

"The new flex groove placement in the outsole adapts to impact stresses, enhancing overall performance."

flex groove

impact stress

midsole compression

"The Glycerin 21 is lighter than its predecessor, contributing to an agile running feel."

lightweight

performance

"The shoe's lighter weight contributes to a more nimble feel during runs."

lightweight

nimble

running

"Many runners might find the shoe surprisingly light despite its cushion."

lightweight

cushioned

riding feel

"Despite its lighter weight, the Ghost 16 offers a reliable and comfortable ride."

lightweight

performance

reliable

"The shoe maintains a balanced weight, neither too heavy nor too light."

balanced weight

middle category

"The shoe has been made slightly lighter while maintaining its plush feel."

lightweight

performance

upper

"The Glycerin 21 offers a lightweight feel, which can be beneficial for longer runs."

lightweight

performance

running efficiency

"The shoe maintains its weight despite the additional cushioning, making it an appealing option."

lightweight

performance

comfort

"The nitrogen-infused foam in the Glycerin 21 improves the shoe's lightweight feel and responsiveness."

lightweight

responsive

"The shoe has a modest weight reduction compared to previous models, enhancing overall feel and performance."

weight

performance

"The ride of the shoe is smooth and predictable, ideal for daily running."

performance

smooth ride

daily running

"The Glycerin 21 is a great shoe for easy runs and treadmill running due to its cushioning."

easy runs

treadmill

cushioning

"The absence of a rocker allows for a natural feel during runs, accommodating various running styles."

performance

natural

running_style

"The shoe offers smooth transitions through the gait cycle, making it uncomplicated for daily use."

gait

simplicity

daily trainer

"The transitions while running are smooth, making for an enjoyable running experience."

smooth

running experience

performance

"The Glycerin 21 is suitable for various types of runs due to its balanced blend of softness and responsiveness."

neutral trainer

responsive

balanced feel

"This shoe performs well for various running situations, showing versatility in its use."

multi-purpose

running styles

"The shoe works well as a daily trainer for a variety of runs including long and easy runs."

daily training

long runs

"The shoe is versatile enough for various types of running, including long runs and tempo work."

daily runs

tempo

long runs

"These shoes are versatile and suitable for various types of workouts."

versatile

workouts

"The Glycerin 21 is versatile enough for both easy runs and faster-paced workouts."

versatile

daily running

responsiveness

"The Triumph 21 is described as a versatile shoe suitable for different running paces, providing a punchy feel when quickening up."

pacing

versatile

"The shoe maintains good versatility for a variety of running paces and styles."

multi-purpose

versatile

"The overall versatility of the Glycerin 21 makes it suitable for a wider range of running activities, including longer runs."

versatile

long runs

performance

"The shoe performs well for short bursts of speed."

speed

performance

short_runs

"Transitioning through the midfoot is smooth, enhancing the overall running experience."

smooth

transition

running

"The outsole design improves heel-to-toe transition during running."

heel-to-toe

transition

"The shoe's ride is well-balanced, providing comfort without being overly soft."

well-balanced

nicely cushioned

resilience

"The cushioning's balance between comfort and responsiveness makes both shoes enjoyable for various paces."

responsive

versatile

"The shoe maintains good cushion without feeling dull during runs."

cushion

not dull

comfort

"The Glycerin 21 has a more flexible forefoot due to design changes in the outsole, improving the running experience."

outsole

flexibility

performance

"The shoe allows for pleasant flex through the forefoot, enhancing overall running experience."

forefoot

flex

running experience

"The Brooks Glycerin Max has a rocker geometry that enhances smooth transitions and feels more responsive."

rocker

smooth transitions

"The rocket geometry in the new version provides improved transitions during runs, enhancing the runner's experience."

rocker geometry

transitions

"The Glycerin 21 features an updated, more aggressive rocker geometry, improving the running experience."

rocker

aggressive

"The Glycerin is designed for long-distance running, making it ideal for marathon training."

marathon

endurance

"The Brooks Glycerin 21 benefits both performance and the environment, making it a dual-purpose choice."

performance

environment

running

"The shoes' performance in a 5K demonstrates their effectiveness for runners."

endurance

"The Ghost 16 maintains a smooth ride, making it effective for various running styles."

smooth

reliable

versatile

"The review highlights that the Brooks Glycerin 21 has a light and responsive feel due to its DNA Loft V3 foam."

responsive

energy return

midsole

"The Brooks Glycerin 21 offers a more springy and responsive ride compared to the Nimbus 26."

responsive

performance

Brooks Glycerin 21

"Overall, both shoes provide a consistent ride throughout long runs, maintaining their comfort level."

consistency

long runs

"The Brooks Glycerin 21 utilizes nitrogen bubbles in its construction, enhancing its lightweight and performance."

lightweight

performance

rebounds

"The updated midsole technology offers better energy return and responsiveness during runs."

responsiveness

energy return

"The overall improvements in midsole and outsole design contribute to a more responsive and adaptable shoe."

adaptability

responsiveness

"The ride of the shoe has been improved dramatically, providing a nice balance of softness and energy return."

ride

performance

energy return

"The shoe is reliable for daily training with good performance across a variety of paces, especially at easy paces."

daily trainer

performance

easy pace

"It is designed specifically for road running, making it suitable for that purpose."

road running

performance

"The Brooks Glycerin 21 has a more pronounced rocker than the 20, promoting a more efficient stride."

rocker

efficiency

performance

"The shoe provides a firm yet comfortable ride, suitable for various running paces."

firmness

comfortable ride

"The construction of both shoes allows for a smooth ride from heel to toe, enhancing the running experience."

smooth ride

heel to toe

geometry

Cons

"The Glycerin 21 may not be the best choice for speed workouts."

training

speed

performance

"Despite being cushioned, the shoe does not feel fast during runs."

cushioned

not fast

"The shoe has a slow turnover, making it less suitable for speed work."

slow

turnover

"The shoe may not be ideal for speed-focused runs."

performance

speed

race

"The shoe does not perform well at high speeds, making it unsuitable for fast-paced runs."

high-speed

run types

"The shoe does not feel fast during runs."

slow

pace

"The shoe feels best suited for easy and recovery runs rather than speed."

performance

stability

"The Glycerin 21 isn't suitable for speed-focused runs, limiting its versatility."

speed

track workouts

intervals

"The Glycerin 21 may not perform as well in faster efforts compared to the Ghost Max."

effort

pace

"The shoe is not ideal for speed."

speed

performance

"The shoe lacks responsiveness and is not designed for faster runs."

not for speed

long runs

"The shoe lacks high-speed performance capability, making it unsuitable for tempo runs."

tempo

high-speed

performance limitations

"The ride lacks energy compared to other max-cushioned shoes."

ride

performance

"The transition feels smooth but lacks responsiveness, particularly at faster paces."

transition

responsive

slow

"The shoe lacks bounciness and energy return, which may disappoint runners seeking a responsive feel."

bouncy

energy return

smooth ride

"The shoe lacks responsiveness, making it feel less exciting during runs."

responsiveness

foam

exciting

"The cushioning may not provide the desired responsiveness for faster paces."

performance

cushioning

speed

"The shoe lacks excitement and responsiveness during runs."

predictable

foam

lack of bounce

"The midsole can feel a bit slow when pushing the pace, limiting its use for faster runs."

slow

tempo runs

performance

"The Glycerin 21 lacks responsiveness when compared to the Ghost Max."

midsole

energy return

"The reviewer finds the Glycerin 21 to be a little more ponderous, lacking the snappiness required for faster sprints."

ponderous

responsiveness

fast runs

"The foam, while comfortable, lacks responsiveness and energy return during runs."

energy return

bounce

comfort

"The shoe is primarily suited for slow to easy runs rather than fast paces."

slow

easy runs

"Some runners might desire more energy retention from the midsole during runs."

energy loss

midsole

efficient performance

"The Glycerin 21 uses materials that feel less exciting compared to competitors at a similar price point."

materials

competition

price

"Overall, the shoe's experience was described as boring, which may not appeal to all runners."

boring

experience

running

"The shoe is not suitable for high-intensity runs."

high-intensity

performance

"Absence of a rocker may lead to a reduced smoothness of the stride for some runners."

rocker

smoothness

"DNA Loft v3 foam lacks significant energy return for performance-oriented runs."

energy

foam

performance

"The Nimbus 26 may feel too soft for some runners, offering a mushy experience that lacks energy return."

softness

mushy

performance

"The performer of the Triumph 21 appears to be more enjoyable and offers better energy return at slower paces compared to the Glycerin 21."

energy return

performance

slow paces

"Some users may find the weight of the shoe to be a bit limiting."

weight

speed

"The shoe's weight becomes noticeable during speed work, which may affect performance."

weight

speed

performance

"The shoe is considered heavy for a running shoe, which may hinder performance."

heavy

performance

"The GEL Nimbus 26 is significantly heavier than the Glycerin 21, which may affect performance."

heavy

weight difference

"This shoe is heavy compared to others in its class, making it less ideal for speed work."

speed

heavy

tempo

"The ride is more suited for easy and medium-paced runs, limiting versatility."

daily trainer

easy runs

"Increased cushioning has led to a loss of versatility in running at faster paces."

cushioning

performance

versatility

"Glycerin 21 lacks versatility for faster runs."

performance

speed

"The shoe may not be the best option for those seeking a true all-purpose shoe due to its limitations in certain areas."

all-purpose

versatility

not for racing

"The shoe lacks pace versatility, making it feel sluggish."

pace

versatility

"The Glyerin 21 is more versatile while the Nimbus 26 is less suited for faster paces, reflecting its limitations in performance."

versatility

performance

"Lack of lively performance when attempting to pick up the pace."

pace

treadmill performance

"There was a lack of a rocker feel which could hamper quicker transitions during runs."

rocker

transitions

performance

"The first impression doesn't provide a deep analysis of performance."

first impression

early usage

"No performance-related negatives are identified."

"The overall identity of the Ghost 16 feels overly familiar with no significant innovations."

familiarity

performance

innovation

"The Ghost Max offers a better ride for picking up the pace."

pace

effort

"While the shoe has many positive features, there is little mention of advanced performance capabilities."

reliability

durability

"The shoe feels overly flexible, which may require more effort from the runner."

flexibility

effort

energy loss

"The feel difference between the drop may not be discernibly impactful during a run."

drop

performance

feel

"The overall softness of the shoe while walking may not translate well to running performance."

performance

walking vs running

fit
True to size: True to size
Toebox width: Wider
Heel width: Average
Orthotic friendly: No

The most common issues with the shoe fit are that the toe box can feel too spacious or restrictive for some runners, and the lack of a gusseted tongue may lead to reduced lockdown and security.

width (5)

breathability (4)

tongue (4)

length (4)

secure (3)

heel (3)

toe box (2)

snugness (2)

Pros

"The shoe offers a spacious and comfortable toebox, improving the overall fit for runners."

spacious

comfort

"The upper is crafted with a new material, making it more flexible and breathable."

flexibility

breathability

"The upper of the shoe fits well and feels similar to the previous version, providing a good fit."

fit

upper

"The shoe's upper is made of a knit material, providing a snug fit without compromising comfort."

snug fit

knit material

"The shoe has a wider and more comfortable toe box, providing a better fit during runs."

width

comfort

fit

"The new warp knit upper allows for a more voluminous fit in the toe box, accommodating natural foot splay."

warp knit

voluminous fit

natural splay

"The shoe features a wider and more comfortable toe box compared to its predecessor."

fit

comfort

wider

"The shoe has a wider toe box compared to its predecessor, enhancing comfort."

wider toe box

comfortable fit

"The Ghost 16 has a roomy toe box, providing good flexibility for the toes."

toe box

flexibility

comfort

"The toe box of the Brooks Glycerin 21 is notably roomy and well-structured."

roomy

structured

wide

"The fit of both shoes is praised for allowing ample toe wiggle room, enhancing comfort during runs."

toe room

comfort

"The toe box in both shoes offers ample room, contributing to their overall comfort during runs."

spacious

comfortable fit

"The Brooks Glycerin 21 has a consistent and snug fit across different foot shapes."

fit

foot shape

security

"The updated upper design fits well for average width feet, avoiding excess material."

fit

upper

"The spacious toebox allows for natural foot movement and increased comfort."

fit

comfort

toebox

"The original upper is designed with more room in the toe box and midfoot, catering to runners with higher volume feet."

toe box

high volume

comfort

"The shoe fits true to size, accommodating a variety of foot shapes."

true to size

fit

accommodating

"The upper reworking allows for a more streamlined fit while maintaining breathability."

fit

upper

streamlined

"The shoe comes in a stealth fit version that offers a sock-like upper for better fit."

sock-like

fit

streamlined design

"The Brooks Glycerin 21 has a very accommodating fit, catering to different foot shapes and sizes."

accommodating

fit

foot shape

"The Glycerin 21 is more accommodating in fit, particularly around the midfoot and toes."

accommodating

midfoot

"The shoe fits great and generally disappears off the feet during runs."

fit

comfort

unobtrusive

"The adjusted fit is slightly wider than previous versions, catering to different foot shapes."

fit

wide

comfort

"The shoe offers a better fit with more room throughout the length of the shoe, making it more comfortable for wider feet."

fit

comfort

wide

roomy

"Despite being a wider shoe, the fit remains accommodating for various foot shapes."

wide fit

accommodating

"The shoes fit well, accommodating a wide foot size comfortably."

wide fit

comfort

"The shoe fits true to size and offers a roomy toe box, accommodating various foot shapes."

true to size

toe box

fit

"Fit is favorable in both shoes, with a good width that accommodates regular runners comfortably."

fit

accommodation

comfort

"Both shoes fit true to size and offer a wide toe box, making them suitable for slightly wider-footed runners."

true to size

wide toe box

comfort

"The wider toe box in the Brooks Glycerin 21 enhances comfort for runners with more foot volume."

toe box

comfort

fit

"The shoe comes with a wider fit which provides ample room in the forefoot area."

wide fit

forefoot

wiggle room

"The heel fit is stable, ensuring the foot remains locked in during runs."

heel_fit

stability

lockdown

"The added padding in the heel collar enhances fit by pushing the foot forward slightly."

heel_padding

fit

adjustment

"The engineered mesh upper contributes to breathability and keeps the shoe comfortable over time."

fit

upper

breathability

"The shoe offers a secure fit with an engineered warp-knit upper, enhancing breathability and comfort."

snug fit

breathable upper

comfort

"The shoe features a breathable engineered mesh upper made from recycled materials."

breathable

sustainability

fit

"The upper design allows for excellent breathability and a secure fit."

breathable

lightweight

secure fit

"The secure fit is helped by the effective lacing system that molds the upper around the foot for a personalized feel."

fit

lacing_system

customization

"The classic laces allow the user flexibility in tying techniques for a secure fit."

laces

adjustability

fit

"Reviewers enjoyed the classic Brooks fit, which is roomy in the toe box and snug in the midfoot and heel."

roomy toe box

secure heel

midfoot support

"The upper has a good fit, providing a secure and enjoyable experience."

fit

secure

predictable

"The fit of both shoes is true to size and offers a secure lock down."

fit

secure

lockdown

"Both shoes provide a secure fit with good heel hold, preventing any irritation during runs."

heel hold

forefoot room

"The fit of the Glycerin 21 has been optimized to provide a roomy toe box and great heel hold without any hot spots."

toe box

heel hold

no hot spots

"The shoe fits true to size and offers a roomy toe box, which is beneficial for runners with wider feet."

true to size

wide feet

comfort

"The shoe includes a variety of width options, ensuring a better fit for different foot shapes."

sizes

medium fit

wide fit

"The knitted upper improves fit, comfort, and security."

knitted upper

comfort

fit

"The shoe offers a snug but not restrictive fit, ideal for various foot shapes."

true to size

snug fit

comfort

"The fit of the shoe is true to size and accommodates different foot shapes."

true to size

accommodating

no tightness

"The Brooks Glycerin 21 offers a wide variety of fit options, including both medium and wide sizes."

fit options

wide fit

medium fit

"Both shoes maintain a consistent and reliable fit across various foot shapes and sizes."

true to size

reliable fit

"The Brooks Glycerin Max features a better heel design for comfort during runs."

heel design

stiffer heel counter

"The original version is praised for its superior lockdown compared to the stealth fit version, providing better security during runs."

lockdown

secure

better fit

"The shoe is designed to provide a snug, lock-down fit that enhances stability."

fit

lockdown

stability

"The upper features engineered warp mesh for both support and breathability."

breathability

support

fit

"The shoe provides a secure heel fit due to added stitching."

custom fit

heel support

"The Ghost 16 excels in providing a traditional and reliable fit that caters to everyday use."

traditional

everyday use

"Lacing system secures the foot effectively without causing discomfort, enhancing the overall fit."

lacing

foot lockdown

comfort

"The shoe provides a secure fit during runs."

secure fit

stability

"There is a notable contrast in fit between the two shoes, with the Ghost Max feeling slightly tighter and more secure."

snug fit

lockdown

secure

"The mesh material allows for good stretch and accommodates different foot sizes."

fit

mesh

width

"The shoe fits true to size and offers a wider feel."

true to size

width

stability

"The Ghost 16 is noticeably lighter than the Glycerin 21, enhancing versatility."

lightweight

versatile

"Both shoes provide a comfortable heel hold, although the Glycerin's heel is favored for its design."

heel hold

design

"The shoe is designed for a wide range of foot types with a neutral fit."

neutral

daily trainer

flexible fit

"The Glycerin 21 is noted for having a structured heel counter that enhances security and fit."

fit

heel counter

Brooks Glycerin 21

"The shoe maintains a comfortable and consistent fit without the need for break-in time."

easy fit

ready to go

"The shoe caters to different foot widths, offering standard and broader options for a better fit."

variety

custom fit

"The heel lock design in the Triumph 21 contributes to a secure fit, allowing users to run comfortably without sliding."

secure fit

comfort

"The shoe has a true-to-size fit, which is important for overall comfort."

true to size

fit

"The flexibility of the forefoot allows for a more comfortable run, particularly for those who dislike stiffness."

forefoot flexibility

comfort

running

Cons

"The upper structure caves in at the big toe under pressure."

big toe

upper structure

comfort

"The toe-box feels restrictive and may be uncomfortable for some runners."

toe-box

claustrophobic

"The toe-box may not accommodate high volume feet, potentially leading to discomfort."

high volume

toe-box

"The lack of a gusseted tongue may lead to reduced lockdown for some runners."

gusseted tongue

lockdown

personal preference

"The tongue on the Glyerin 21 lacks gusseting, which may affect the overall hold of the shoe."

tongue

fit

"The absence of a gusseted tongue may affect lock down for some runners."

gusseted tongue

lock down

fit

"There's no gusseted tongue which could affect security of fit."

tongue

security

"The heel counter height is perceived to be lower, which could affect fit for some runners."

heel counter

fit

optical illusion

"The 10mm drop encourages a heel strike, which may not be suitable for all runners."

heel strike

running form

drop preference

"The heel-to-forefoot drop may favor heel strikers, potentially impacting midfoot runners."

heel striker

midfoot

drop

"The cushioned upper makes it difficult to achieve a secure lockdown with the laces."

cushioned upper

lace security

tightening issues

"The lockdown of the stealth fit edition is not as strong compared to the original version."

lockdown

fit

"The shoe lacks a gusseted tongue, which can impact the fit."

fit

design

"The tongue design does not secure the foot properly for those with narrower feet."

fit

narrow feet

"Rubbing on the medial forefoot caused a small blister during a long run."

blister

medial forefoot

long run

"The length of the shoe may be slightly too long for some users, potentially affecting fit."

length

fit

sizing

"The shoe might feel short until the material breaks in."

fit

length

short

"The extra length in Glycerin 21 may be excessive for some."

excess length

toe box

"The heel padding may contribute to a feeling of being a bit short in fit."

fit

padding

"The fit is wider than in previous versions, which may not suit everyone."

fit

width

comparison

"The shoe has a narrow fit, which may not accommodate all foot shapes comfortably."

fit

narrow

"The shoe may feel narrower to some users compared to older models."

narrow fit

size adjustment

"Some runners may find the toe box too wide, which could result in fit issues for those with narrower feet."

wide toe box

narrow fit

fit issues

"The shoe might be too wide for individuals with narrow feet."

fit

width

"The upper fit has changed to be narrower and shorter, which might not suit all foot shapes."

size

toe box

"Fit may feel a bit too snug, especially for those with wider feet."

fit

narrow

"The fit is described as generous, which could cause issues for those needing a snugger structure."

generous

snug

"The previous versions of Glycerin were better suited to a different style of runner."

runner type

individual fit

"Fit consistency raises concerns for variability among different foot shapes."

standard fit

variability

"The toe box feels too spacious and may border on being baggy for some runners."

spacious

baggy

toe box

"The fit may not be ideal for those who prefer a snugger shoe."

fit

snug

size

"The snug fit of the stealth fit version may not be suitable for everyone."

snug

toe box

fit

"The shoe has a noticeable high drop which might not suit all runners."

drop

fit

height

"Heel slippage may occur due to design issues with the counter."

heel

slippage

lock

"The heel fit may feel overly tight for some runners."

heel fit

tightness

"The heel counter on the Ghost 16 is overly structured and causes irritation."

heel counter

Achilles irritation

structure

"Discrepancy in reported medial width adjustments compared to predecessors leads to uncertainty."

medial width

fit concerns

"The stealth fit upper is snug through the midfoot, which may not suit everyone."

fit

snug

upper

"There are no fit issues highlighted in the review."

"The fit of the toe box in the Ghost 16 is narrower compared to its Glycerin counterpart."

narrow

comfort

toe box

"The Ghost 16's toe box feels narrow and short compared to the Glycerin 21."

narrow toe box

short fit

"Some users may prefer a lighter shoe as this one falls in the middle weight category."

weight

balance

"The shoe does not offer flexibility required for varied running styles."

flexibility

fit issue

"The Glycerin 21 may feel too loose for some runners."

toe box

roominess

"The Nimbus 26 has a looser fit which might not provide an ideal lockdown for every runner."

fit

lockdown

"The Glycerin 21 may not feel as energetic or dynamic for some runners."

looseness

energy

"There is a potential mismatch in fitting between the Ghost 16 and Glycerin 21, risking discomfort on longer runs."

fit issues

comfort during runs

"The fit of the GEL Nimbus 26 may cause some bunching in the tongue area, which can be uncomfortable for some runners."

bunching

cinching

"Due to the high stack height, the Triumph 21's ride may feel tilted which can be an adjustment for some runners."

high stack

tilted ride

fit

"Some runners may have difficulty adjusting from the midsole of the Glycerin 21 which feels flatter compared to the Triumph 21."

transition

fit

tilted ride

"There could be improvements made to the lacing system for better midfoot wrapping."

gusseted tongue

midfoot wrapping

"Some users may experience heel slippage due to the fit being wider than expected."

heel slippage

fit issues

stability
Stability level: Average

The main concerns about the shoe's stability include inadequate heel stability, a lack of noticeable rocker for smoother transitions, and some runners feeling it doesn't provide enough support, all of which were mentioned frequently.

support (5)

flexibility (3)

platform (3)

transition (2)

heel counter (2)

lockdown (2)

rocker (2)

supportive (2)

Pros

"Transitions in the Glycerin 21 feel smooth and stable, contributing to a good running experience."

smooth transitions

stability

"The shoe is designed to be stable, maintaining a sturdy platform despite the plush cushioning."

stability

wide base

platform

"The shoe is recognized for its smooth and stable transitions during runs."

smooth

stable

"The shoe offers a smooth transition for heel strikers, thanks to its beveled heel design."

beveled heel

smooth transition

heel striking

"The outsole offers a broader platform which enhances stability with the increased stack height."

stability

outsole

stack height

"The shoe's stability is particularly advantageous for heel strikers, offering a reliable ride."

stability

heel

performance

"The comfortable fit, coupled with great stability, makes it a great choice for extensive runs."

stability

comfort

performance

"The Glycerin 21 offers a flexible ride, making it versatile for different types of runs."

flexibility

natural

performance

"Both shoes allow for a natural running experience due to their flexibility."

flexible

natural movement

stability

"The shoe maintains good flexibility, allowing for a more natural foot movement."

flexible

natural movement

comfort

"The shoe features a padded heel counter that enhances comfort and stability."

heel counter

comfort

stability

"The heel counter is designed for good fit and comfort, effectively holding the foot in place."

secure fit

stability

"The heel cup provides excellent stability, ensuring your foot is well supported during runs."

stability

heel_cup

support

"The GTS version provides mild anti-pronation support, making it versatile for both neutral and overpronating runners."

stability

guidance

anti_pronation

"The shoe remains predictable and stable over longer runs, providing support for heavier runners."

stability

weight

long runs

"The GTS 21 model offers additional support for those who need it."

support

GTS 21

"The Brooks Glycerin 21 offers a GTS version for additional support, beneficial for those with pronation issues."

GTS

support

pronenation

"There is also a GTS support version available, which features guide rails for natural stride support."

guide rails

support

stability

"The shoe holds the foot securely in place, providing a feeling of stability throughout the run."

foot secure

stability

"The shoe provides excellent lockdown support, adding to its overall comfort level."

support

secure fit

"Reviewers appreciated the stability provided by the shoe's wider base and supportive design."

stability

wider base

centered foot

"The shoe provides a stable and smooth transition due to its broad platform."

broad platform

stability

smooth transitions

"The broader platform of the shoe contributes to stability and smooth transitions."

broad platform

stability

smooth transitions

"Brooks Glycerin 21 has a wide platform which enhances stability during runs."

wide platform

stability

"The GTS version’s guide rail support system effectively aids runners needing extra stability."

support

stability

"The lower drop of the Brooks Ghost Max 2 contributes to a more stable running experience."

lower drop

stability

running experience

"The guide rail system helps with alignment for overpronators and supinators."

guide rails

overpronation

stability

"Overall stability during runs is noteworthy, making it suitable for various running styles."

stability

support

running style

"The shoes provide stability with protective rails on the sides."

stability

support

protective

"A 10mm offset is ideal for runners with various foot conditions."

10mm offset

Achilles support

calf support

"Both shoes feature effective rockers that aid in a natural running motion."

stability

rocker

natural motion

"The shoe is designed for neutral runners, providing support for long-distance runs."

support

long distance

"The shoe boasts a wide base providing inherent support which is beneficial for runners."

support

stability

wide

"The wide base contributes to stability and smooth transitions."

stability

transitions

"The updated Glycerin GTS 21 offers enhanced side wall support for increased stability during runs."

support

stability

heel

"The Glycerin 21 offers excellent heel support with a solid heel counter."

heel counter

support

"The Glycerin 21 features a slightly widened platform which enhances stability and comfort."

platform

stability

"Both models provide a stable ride, but the Glycerin 21 maintains stability while allowing for a more cushioned feel."

stability

consistent ride

"These running shoes offer great stability, perfect for uneven surfaces."

stability

support

trail

"The shoe provides natural support despite being categorized as neutral due to its construction."

neutral

support

flared midsole

"The shoe features a unique guide rail system that provides great stability during runs."

guide rails

unique

stability

Cons

"The shoe's heel stability is inadequate, especially for walking."

walking

stability

heel

"The midfoot side rails do not enhance stability noticeably for all runners."

stability

footing

"The shoe feels flat and lacks a prominent forefoot rocker for better transitions."

transitions

rocker

"Glycerin 21 lacks a noticeable rocker for smoother transitions."

transition

running dynamics

"Although the Glycerin 21 has a snug fit, some runners still feel a lack of stability."

fit

stability

"The heel counter is quite rigid, which could be uncomfortable for some runners."

rigidity

discomfort

"The heel counter of the stealth fit version is flexible, which might not provide enough support for some runners."

flexibility

support

heel

"The midsole stability is poorer compared to its predecessor, particularly for heavier runners."

heavy runners

gait types

"Some runners may experience discomfort due to the design of the anti-pronation support, which is less controlling than expected."

support

pronation

"There are some stability concerns for runners who need extra support."

stability

support

"The midsole's extra features like lateral side rails may be unnecessary for many users."

stability

unneeded

"The shoe might not provide enough support for runners needing extra stability."

stability

support

"While the shoe is designed for a broader platform, there is still some perceived wobble during runs."

midsole

wobble

stability

"The shoe's midsole feels unstable during runs, especially when fatigued."

instability

tired legs

midsole

"The shoe may require more testing to fully evaluate stability over longer distances."

long distance

instability

future evaluations

"Brooks shoes generally work better with a wider base for stability."

stability

width

"The heel-to-toe drop requires adjustment, potentially impacting running mechanics."

heel-to-toe drop

slanted feel

"The GTS model includes guide rails which may not be beneficial for neutral runners."

guide rails

neutral runner

"The Brooks Glycerin 21 may feel less stable compared to the Ghost Max 2 due to its design."

stability

base

"Some runners may find the guide rail system unnecessary or restrictive."

guide rail

support

"While the shoe is stable, it may not provide enough performance for highly demanding runs."

stability

running performance

"There is little difference in stability between the two models, which could be a disadvantage for those looking for improved features."

stability

similarity

"Despite being a stability shoe, the reviewer prefers the versatility of the Ghost Max."

preference

comparison

"The stability of the Ghost 16 could be negatively influenced by its heel design which may not suit all runners."

stability

heel issues

"The outsole has been segmented which may affect performance during runs."

outsole

performance

"The heel counter's flexibility may impact lockdown stability during runs."

heel counter

flexibility

lockdown

"Lockdown fit is just okay, not as secure as expected for a performance shoe."

lockdown

stability

fit

"The shoe's improved flexibility may not suit all runners, especially those who prefer a stiffer ride."

personal preference

stability

ride

"Some runners may prefer features provided by alternative models for stability."

stability

alternative model

grip

The main points to note are that the shoe's grip is often praised for its versatility and performance in wet conditions, but there are concerns about its average traction on very wet, muddy, or grassy surfaces, as well as a desire for improved grip overall.

durability (4)

traction (3)

outsole (3)

versatility (1)

weather (1)

wet surfaces (1)

wet performance (1)

improved grip (1)

Pros

"The RoadTack outsole enhances grip across various surfaces, making it versatile for different running conditions."

grip

outsole

durability

"The new RoadTack outsole enhances grip and durability for running on various surfaces."

enhanced grip

wet conditions

outsole durability

"The outsole has been upgraded with a new rubber and recycled silica, enhancing grip and durability."

outsole rubber

recycled materials

grip

"The rubber coverage in the outsole improves the overall grip and durability of the shoe, enhancing performance on different surfaces."

rubber coverage

performance

grip

"The outsole provides excellent grip in wet and slippery conditions."

grip

wet conditions

"The shoe has decent traction, suitable for various terrains."

outsole

traction

trail running

"The traction on the outsole has been improved, enhancing grip during runs."

outsole

traction

improvement

"The outsole utilizes RoadTack rubber for good grip in various wet conditions."

RoadTack

wet conditions

grip

"The Brooks Glycerin 21's grip supports stability while running."

traction

control

"The outsole features thick rubber, which prevents slipping and improves grip on various surfaces."

outsole

rubber

safety

"The road grip provided by the outsole is exceptional, especially in wet conditions."

traction

wet conditions

sticky

"The outsole provides excellent grip in a variety of conditions."

outsole

traction

various conditions

"The traction of the shoe is effective, improving performance on faster runs."

traction

performance

running

"The grip of the outsole is fantastic, providing confidence on varied terrains."

grip

traction

wet surfaces

"The Glycerin 21 has a wide platform with durable RoadTack rubber for good traction on wet roads."

wide base

durability

wet traction

"Both shoes offer excellent grip thanks to the same rubber and silica outsole."

outsole

grip

durability

"The segmented outsole design contributes positively to the shoe's ride and grip."

segmented

grip

"The shoes handle well on various surfaces, showcasing their versatility."

versatile

grip

varied surfaces

"The shoe is reliable in various weather conditions as well as different terrains."

weather

grip

versatile

"The rubber outsole provides excellent grip on wet surfaces."

excellent grip

reliable

outsole

"The grip of the Nimbus 26 is improved significantly and performs well in wet conditions."

grip

wet conditions

Nimbus 26

"The updated outsole on the Brooks Glycerin 21 enhances grip and protection during runs on varied surfaces."

outsole

protection

"Both shoes feature a generous amount of outsole coverage, contributing to their grip on wet roads."

outsole coverage

wet roads

"The outsole design of the Glycerin 21 allows for better foam compression and stability during runs."

outsole

grip

stability

Cons

"The traction on wet surfaces is average and not aggressive enough."

traction

wet

"The new outsole material may not perform as well on very wet surfaces compared to expectations."

outsole

wet surfaces

"The outsole provides limited grip on muddy or grassy surfaces."

mud

grip

outdoor

"The grip on extremely slick surfaces may be tested despite good performance in some conditions."

wet

cobblestones

grip

"The shoe's grip could be improved for better traction."

minimal

grip

performance

"No grip-related concerns are raised in the review."

"The flexibility of the outsole rubber may limit overall traction."

flexibility

outsole coverage

"The grip performance may not show significant changes, which could disappoint those seeking better traction."

grip

similarity

other

The main concerns about the Glycerin 21 are its higher price and weight, which were mentioned frequently, indicating that many users find these aspects less appealing.

weight (7)

versatility (5)

sustainability (4)

aesthetics (3)

style (3)

temperature (3)

price (3)

cost (3)

Pros

"Overall, the Glycerin 21 is touted as a great everyday shoe for both running and walking."

daily use

running

walking

"The Brooks Glycerin 21 is versatile enough to also perform well as a walking shoe."

walking

daily use

versatile

"The shoe is versatile enough for both running and casual wear after use, maintaining its aesthetic appeal."

casual wear

after running life

aesthetics

"The Glycerin 21 is versatile for various types of runs and workouts."

versatile

training

event

"Both shoes are designed to be versatile enough for different activities, whether running or casual wear."

versatile

everyday use

casual wear

"The new version of the Glycerin is lighter, which enhances its overall usability."

lightweight

user-friendly

"The Glycerin 21 is impressively lightweight."

lightweight

"The shoe is considered fairly lightweight relative to its cushioning."

lightweight

cushion

"The Brooks Glycerin 21 and GTS 21 offer a light design, making them easy to wear."

lightweight

design

"The shoe's color options are noted to be inclusive and appealing."

color variety

appealing design

"The design and aesthetic of the stealth fit make it an appealing choice for lifestyle and casual wear."

lifestyle

aesthetic

style

"The shoe comes in fun and interesting color options, which adds to its appeal."

colorful

appealing

"The shoe maintains a consistent feel that runners can rely on year after year."

reliability

trust

brand

"This shoe is specifically designed for high mileage training, making it suitable for easy and recovery runs."

high mileage

training

recovery

"The shoe retains elements from previous models while implementing minor important improvements."

improvements

design

"Overall, the Brooks Glycerin 21 is considered a positive update that maintains a successful lineage."

positive update

success

"The Brooks Glycerin 21 is designed with a sleek appearance that combines style with eco-friendliness."

style

sustainability

design

"The shoes received a compliment from another gym-goer, indicating their aesthetic appeal."

appearance

aesthetic

"The Glycerin 21 has a stylish design with a significant improvement in aesthetics compared to earlier models."

design

style

"This shoe is created with a high percentage of recycled materials, reducing environmental impact."

recycled materials

environment

sustainability

"The Glycerin 21's upper is made of 60% recycled material, making it an environmentally friendly option."

eco-friendly

materials

environment

"Both shoes utilize environmentally friendly materials, with Brooks emphasizing recycled content."

recycled materials

environmental impact

sustainability

"The upper of the shoe is made with over 60% recycled materials, which is environmentally friendly."

recycled materials

environmental impact

"The design and thoughtful details of the shoe packaging add to the overall experience."

packaging

visual appeal

"The Brooks Glycerine 21 has improved aesthetics compared to previous models."

aesthetics

colorway

improvements

"Both shoes have excellent build quality with premium materials."

build quality

premium materials

durability

"The overall build quality of the Glycerin 21 is excellent, reflecting premium materials."

build quality

premium materials

"The shoe is recommended for its overall quality and performance."

quality

recommendation

Cons

"While running, the tongue of the shoe shifts to one side over time."

tongue

fit

alignment

"The shoelaces are of poor quality and tend to fray easily."

quality

fraying

"The shoe's weight could be a concern for runners looking for a lighter option."

weight

lightness

"The shoe is not the lightest option available."

weight

heavy

"The weight of the Brooks Glycerin 21 has increased slightly, which some might find unfavorable."

weight increase

heaviness

performance

"There are lighter alternatives available."

lightweight

comparison

"The shoe feels heavier than it appears, especially for larger sizes."

heaviness

comparison

"The overall weight of the shoe has increased compared to its predecessor."

weight

comparison

Glycerin 20 vs 21

"The increased stack height has added weight, which some runners may find undesirable."

stack height

weight

criticism

"The shoe tends to be slightly warm, which can be uncomfortable in hot conditions."

warmth

comfort

"The shoe is warmer in colder climates, making it potentially unsuitable for hot weather use."

warmth

climate

"There is a suggestion of potential temperature issues due to design."

design

heat

"The price has seen a minor increase, which may deter budget-conscious buyers."

cost

value

"The shoe's pricing may deter budget-conscious runners."

pricing

budget

"The shoe is quite expensive compared to previous models."

price

value

"The lack of reflective elements is a safety concern for low-light running conditions."

safety

reflectivity

"The price has increased compared to the previous edition."

pricing

value

"The shoe's high price point may deter potential buyers when compared to competitors with similar features."

price

competitors

"The price of the shoe is relatively high compared to the previous model which offers similar features."

expensive

price comparison

"The shoe feels heavier than expected despite weight loss from the previous model."

weight

performance

"Glycerin Max is heavier than Glycerin 21."

weight

comparison

"The original version is heavier, which may be a drawback for those seeking a lightweight running shoe."

heaviness

performance

"The styling of some color options is considered less appealing."

style

design

"The shoe is described as potentially boring in terms of color options."

color

design

"The shoe is not visually appealing and is described as somewhat boring."

appearance

design

"While consistent, some may find lack of innovative changes boring."

consistency

innovation

"The shoe's higher price point may be off-putting for some buyers."

expensive

value

"The price of the shoe is considered high and may not provide good value for all runners."

expensive

value

"The price difference between the models may not justify the upgrade for some runners."

price

comparison

"The price difference between the two shoes may lead to confusion regarding their perceived value."

price

value

confusion

"Limited design variety is offered with these shoes."

color

aesthetics

variety

"The shoe's aesthetics are lacking and may not appeal to all runners."

aesthetics

design

"The grip and traction may suffer due to the thick mesh upper retaining moisture."

wet grip

traction issues

"The shoe's cost does not justify its performance, especially when compared to other shoes."

price

performance

value

"The price difference may not justify the extra features of the Glycerin 21."

price

value

features

Model Updates

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Wear-tester reviews (59)

4.3/5

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Brooks glycerin 21

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Pros & Cons

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comfort

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durability

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performance

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fit

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stability

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4.3/5

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