Brooks glycerin stealthfit 21

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

Brooks glycerin stealthfit 21

Price

$329

Rating

High

Popularity

Less Popular

The Brooks Glycerin StealthFit 21 is a premium, high-cushion running shoe designed for comfort and breathability, positioned as a top-tier option within Brooks' lineup, offering a snug fit compared to the traditional Glycerin 21.

Brooks
Brooks glycerin stealthfit
6 colorways

Colorway: CHATEAU GREY/FORGEDIRON

Widths available: normal

Summary

The Brooks Glycerin StealthFit 21 is a high-performance running shoe designed for runners seeking a plush and adaptable fit. It features a streamlined, sock-like StealthFit construction that conforms to the foot for a snug and supportive feel. This model incorporates Brooks' DNA LOFT cushioning throughout the midsole, offering an exceptionally soft underfoot experience that caters to long-distance runners who prioritize comfort. Positioned in Brooks's lineup as a premium cushioned option, the Glycerin StealthFit 21 stands alongside other models like the Ghost and Adrenaline. However, it distinguishes itself by focusing on maximum comfort and a seamless fit, compared to the Ghost's balance and the Adrenaline's emphasis on stability. This makes it an ideal choice for neutral runners desiring a plush ride without compromising on support or fit adaptability.

Surface

road

Cushioning

MinLowMediumHighMax(31mm)

Category

ResponsiveBalancedComfort

Breathability

LowMediumHigh(stealthfit upper)

Weight

266g

Heel-to-Toe Drop

10mm0mm14mm

Support

NeutralLightHigh

Width options

normal

Grip

LowMediumHighMax

Suitability

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Pros & Cons

AI-powered

Fittir conducts a detailed analysis of the Brooks glycerin stealthfit 21 to provide you with a comprehensive overview of the shoes features, pros, and cons based on 19 wear-tester reviews.

Most Mentioned Pros

Most Mentioned Cons

softness (3)
midsole (3)
durability (2)
comfort (2)
firmness (2)
lightweight (1)
stack height (1)
shock absorption (1)
Pros
"It is fairly lightweight for its level of cushioning, which is a notable feature for long runs."
lightweight
cushion
long runs
"The 2 mm extra stack height contributes to a plusher ride compared to previous models."
plush ride
cushion
"The cushioning design provides good shock absorption, making it comfortable for long runs."
shock absorption
long runs
"The cushioning in the Glycerin 21 is plush and comfortable, enhancing the running experience."
soft
plush
comfort
"The Brooks Glycerin 21 features an exceptionally soft cushioning system for a comfortable run."
cushioning
comfort
DNA Loft v3
"The shoe provides excellent cushioning, delivering a soft yet bouncy feel."
cushioning
bouncy
comfort
"The cushioning level remains firm despite being softer than its predecessor, contributing to its potential durability."
firm
durable
"The DNA Loft v3 foam has been improved for added comfort and durability."
DNA Loft v3
added foam
durability
"The Brooks Glycerin 21 features an additional 2mm of DNA Loft v3 cushioning, enhancing overall comfort and performance."
DNA Loft v3
additional cushioning
effortless ride
"The midsole design aids in reducing fatigue during long-distance runs."
fatigue reduction
long distance
midsole engineering
"The use of supercritical foam enhances cushioning and responsiveness."
cushion
responsive
"The midsole uses supercritical foam, which contributes to the comfort and balance between firmness and plushness."
supercritical foam
balance
comfort
"The Glycerin 20 features the softest midsole ever made by Brooks, enhancing the overall running experience."
softness
liveliness
nitrogen infused
"Designed for long-distance running, the shoe provides sufficient cushioning."
cushioning
long distance
adequate
"The shoe features a high heel stack, designed for extensive use and cushioning."
high stack
extensive use
cushioned
"The Glycerin 21 is praised for its exceptional cushioning, making it ideal for long runs."
cushioning
long runs
softness
"The new DNA Loft V3 foam provides a softer and more enjoyable underfoot experience."
softness
bounce
lightweight
"The shoe’s cushioning and feedback offer a balance between softness and responsiveness."
cushioning
responsiveness
"The cushioning offers great responsiveness and support during runs."
comfort
support
flexibility
"The Brooks Glycerin Stealth Fit 21 offers a responsive cushioning system, providing a dynamic running experience."
responsiveness
cushioning
dynamic
"The Brooks shoes have great cushioning that is responsive during runs."
responsive
cushioning
"The shoes provided good cushion, which is essential for long-distance running."
cushion
long-distance
support
"The Brooks Glycerin stealth fit GTS 21 offers exceptional cushioning for a comfortable running experience."
cushioning
comfort
"The Brooks Glycerin Stealth Fit 21 features ultra-soft cushioning that enhances long runs."
cushioning
long runs
comfort
"The DNA V3 Loft midsole provides a plush and comfortable cushioning experience."
DNA V3 Loft
midsole
cushioning
"The sole design contributes positively to the feel of the shoe during runs."
sole design
cushioning
"The new DNA Loft v3 midsole technology provides a different and improved experience over its predecessor."
upgrade
innovation
experience
Cons
"The new midsole may not appeal to those who prefer softer, squishier cushioning."
not soft enough
cushioning preference
user comfort
"The added softness from the new foam may detract from feel for those preferring a firmer ride."
softness
responsiveness
"The shoe may be too soft for some runners, affecting responsiveness."
softness
responsiveness
easy-paced
"The shoe is described as 'too soft' which may hinder more dynamic running experiences."
cushioning
performance
"The cushion was excessively soft, lacking the desired responsiveness."
too soft
lack of responsiveness
"Some users might find the GTS version slightly less soft due to additional support features."
softness
support
gts
"The cushioning may not provide enough feedback for some runners."
cushioning
feedback
softness
"There was not enough cushioning for long-distance runs, raising support concerns."
insufficient cushioning
support concern

fit (3)
support (2)
daily-wear (1)
materials (1)
immediate feel (1)
premium feel (1)
heel comfort (1)
plushness (1)
Pros
"The Glycerin Stealthfit 21 is extremely comfortable, making it ideal for daily wear."
daily use
upper comfort
underfoot cushioning
"The materials used are of high quality, adding to the plush feeling of the shoe."
plush
high quality
padded
"The shoe is designed for a quick wear-in period, providing comfort right out of the box."
quick wear-in
immediate comfort
neutral ride
"The overall comfort of the shoe is plush and premium, enhancing the running experience."
plush comfort
wider platform
comfortable
"Brooks shoes are acknowledged for their quality of fit and comfort, particularly around the heel."
comfortable heel
quality fit
Brooks execution
"The shoe's plushness delivers a heightened level of comfort during runs."
plush
comfort
bounce-back
"The Glycerin 21 offers a luxurious and soft step-in feel."
step-in feel
luxurious
soft
"The shoe features a sock-like tongue that enhances comfort and fit."
comfort
fit
tongue
"The shoe provides a comfortable fit ideal for long-distance running."
comfort
fit
long runs
"The shoe offers a comfortable fit that adapts well to the foot."
comfortable fit
adaptability
"The sock-like tongue design enhances comfort and security during runs."
sock-like tongue
secure fit
comfort
"The Brooks Glycerin Stealth Fit 21 maintains great arch support and comfort for long runs."
arch support
comfort
long runs
"The Brooks Glycerin Stealth Fit 21 provides excellent arch support."
arch support
"The shoes are extremely comfortable, making them a great choice for long runs."
comfort
fit
sock design
"The Brooks Glycerin Stealth Fit 21 allows for breathability during runs."
breathable
comfortable
"The shoe offers excellent breathability and comfort during runs, making it suitable for long distances."
comfort
long distance
breathability
Cons
"While comfortable, the shoe lacks responsiveness, making it less suitable for quick runs."
comfort
responsiveness
performance
"The upper material is very warm, which can cause discomfort during runs."
warmth
upper
discomfort
"There is insufficient padding in the heel, which might not satisfy those who prefer more cushioning in that area."
heel padding
cushioning preference
"The breathability of the stealth fit upper is poor compared to the original version."
breathability
heat
discomfort
"The engineered mesh upper is replaced with a knit upper that some runners might find uncomfortable."
engineered mesh
knit material
comfort level
"The heel design is not very noticeable during walking."
heel
defined sides
feel
"The lacing system in the stealth fit edition leads to lace pressure if tightened, affecting comfort."
lace pressure
comfort issues
tight fit

longevity (4)
tread (2)
build quality (1)
outsole (1)
rubber (1)
weight (1)
toe_area (1)
Pros
"The construction of the shoe is durable, ensuring it withstands wear over time."
durability
long-lasting
"The shoe has durable midsole technology that promises longevity."
nitrogen-infused foam
durable
lasting
"The shoe exhibits excellent durability despite extensive use."
wear
confidence
mileage
"The shoe demonstrates impressive durability, maintaining good condition even after extensive use."
durable
long-lasting
"Durability is notable, with the shoes holding up well even after 6 months of use."
durability
wear-resistance
"The StealthFit edition showcases a durable outsole suitable for long-term use."
durability
outsole
"The shoe features a durable outsole, making it suitable for extensive use."
durable outsole
Roadtack Rubber
hardness
"The Glycerin 21 maintains good durability thanks to its thick rubber coverage."
durability
rubber
Cons
"There is a slight increase in weight compared to the previous model."
weight increase
heavier than previous
overall weight
"Less rubber coverage may suggest a compromise in durability, though not confirmed."
reduced outsole
durability concern
coverage loss
"The tread is too weak, raising durability concerns."
weak tread
durability concern
"The tread is thin, leading to worries about its longevity."
thin tread
longevity concern
"The shoes develop holes in the toe area quickly."
holes
durability issue
toe wear

lightweight (3)
responsiveness (2)
roll (2)
transition (2)
versatility (1)
weight (1)
endurance (1)
rocker (1)
Pros
"The shoe provides a light weight despite its high level of cushioning, aiding in performance."
lightweight
quick turnover
"The shoes were lightweight, making them suitable for marathon training."
marathon
training
lightweight
"The shoe features a lightweight design despite its cushioning and support, enhancing overall performance."
lightweight
performance
"The Glycerin 21 is versatile, suitable for long runs and everyday use, making it a great all-around choice."
everyday
long run
versatile
"The Glycerin 21 offers a responsive feel while maintaining comfort, enhancing the overall running experience."
responsive
comfortable
"Responsiveness of the shoes enhances the running experience, allowing for better performance."
performance
response
"There is a significant reduction in weight compared to the regular Glycerin 21."
weight
lightweight
performance
"The shoes have a significant weight reduction compared to the regular version, enhancing their appeal for daily runners."
weight reduction
lightweight
daily running
"The shoe is lightweight, making it easier to run and reducing fatigue."
lightweight
performance
"It is highly effective for long runs due to its comfort and lightweight design."
endurance
long runs
performance
"The Glycerin 21 offers an improved rocker geometry, enhancing comfort and performance."
rocker geometry
comfort
performance
"The midsole of the Glycerin 21 is designed to provide a moderate amount of energy return, making it efficient for running."
energy return
softness
"The shoes allow for a comfortable experience on long runs."
long runs
comfort
"The shoe performs well in a variety of running conditions, instilling confidence for upcoming races."
race preparation
confidence
performance
"The New Balance Fuel Cell Supercomp Trainer V2 had a unique rolling action, enhancing performance."
unique
performance
rolling
"The New Balance Fuel Cell Super Comp Trainer V2 has a unique and enjoyable rolling action."
smooth
transition
"There is a noticeable rocking motion in the shoe that aids in maintaining engagement during runs."
rocking
engagement
"The shoe offers a nice transition for various foot strike patterns."
transition
foot strike
midsole
"The shoe promotes smoother transitions from heel to toe, improving running efficiency."
smoother transitions
running efficiency
performance
Cons
"The shoe has a slow turnover speed, making it less ideal for faster paces."
slow
performance
turnover
"The shoe is best for slow and easy runs, which may not satisfy runners looking for versatility."
slow
easy
performance
"The Glycerin 21 lacks the energetic feel found in other max-cushioned competitors."
max-cushioned
competitiveness
energy
"The greater stack height could lessen ground feel, making the shoe feel less connected to the surface."
stack height
ground feel
connection to surface
"Some runners did not feel fast in the shoe, indicating a lack of performance."
performance
speed
"The shoe's plushness might not be suitable for longer or more intense runs."
cushioning
performance
intensity
"The midsole's performance is affected in cold conditions, providing a firmer experience."
cold performance
midsole stiffness
"The overall performance is still uncertain after only a few miles run."
performance
mileage
testing
"The shoe is not suitable for racing due to its lack of responsiveness."
racing
responsiveness
"The shoe is not very responsive or snappy during runs, which may be a downside for those seeking faster performance."
responsiveness
performance
"The shoe's weight may be a drawback for speed work."
heavy
speed work

toe box (4)
secure (3)
breathability (2)
tongue (2)
width (2)
size (2)
flexibility (1)
space (1)
Pros
"The shoe features a wider and more comfortable toe box, enhancing fit."
comfort
fit
"The toe box offers a more voluminous fit, allowing for natural foot splay."
voluminous fit
toe box
natural splay
"The toe box initially felt snug but became more comfortable as running progressed."
fit
comfort
size-recommendation
"The toe box provides ample room, contributing to overall user comfort."
fit
toe room
"The new upper design enhances fit by offering more flexibility and a snug feel."
flexible
supportive
comfortable
"The shoe has a spacious toebox which improves comfort during runs."
toebox
comfortable
"The heel design ensures a secure fit without slippage, enhancing overall stability."
secure fit
no slippage
"The shoe has improved breathability, enhancing overall comfort during runs."
breathable
comfort
"The new warp-knit upper design contributes to breathability and secure fit."
breathable
secure fit
warp-knit upper
"The shoe maintains a classic Brooks fit that is consistent and comfortable."
classic fit
roomy toe box
snug midfoot
"The original Glycerin 21 version has a more accommodating fit, especially in the toebox and midfoot."
toebox
fit
comfort
"The fit of the shoe feels secure without being overly tight."
fit
comfort
secure
"It provides a streamlined, sock-like feel which ensures a secure fit."
sock-like
secure fit
adaptation
"The shoe maintains a secure fit with minimal heel slip, contributing to overall comfort during use."
fit
comfort
secure
"The laces maintain their fit without needing adjustments, providing consistent support."
support
convenience
fit
"The shoe provides good overall support, making it feel secure on the foot."
support
ease
user-friendly
"The self fit upper delivers a sock-like feel, adding to overall comfort and adaptability to the foot shape."
fit
upper
comfort
"The upper material is designed to prevent blisters and offers a comfortable fit."
sock-like
blister prevention
comfortable fit
"The shoe offers a snug and flexible fit due to its adaptable upper design."
fit
flexibility
upper design
"The sock-like design offers a secure fit, enhancing overall comfort."
fit
sock design
"The fit of the Brooks shoe is highly effective, allowing freedom of movement while still being secure."
secure
freedom
Cons
"The toe-box is somewhat cramped, which may not be suitable for runners with wider feet."
claustrophobic
fit
toe-box
"The laces on the shoe are of poor quality and tend to fray easily."
cheap
fraying
fit
"The upper material caves slightly under pressure on the big toe."
pressure
fit
upper
"The lateral movement of the tongue can be problematic during long periods of walking."
walking
fit
movement
"The shoe lacks a gusseted tongue, which could improve lockdown."
gusseted tongue
lockdown
fit adjustment
"The fit of the shoe is narrower compared to the regular Glycerin model, which could be restrictive for wider feet."
fit
narrow
"The fit is narrower compared to the regular Glycerin model, potentially making it uncomfortable for those who prefer a more spacious shoe."
narrow fit
spaciousness
"The stealth fit version has a snug fit that may feel tight through the midfoot."
snug
tight
fit issues
"The shoe feels tight due to the knit upper."
knit upper
fit
tight
"The toe box may be too small for some runners."
toe box
size
fit
"The fit may be too snug, suggesting a need for a half size larger."
fit
size
"Experiencing a hot spot after a month of running."
hot spot
discomfort
"The split tread design made for an uncomfortable landing sensation."
split tread
landing sensation
"The shoe's upper, while nice, is narrower compared to prior models, which may not suit everyone."
width
fit
upper
"The sock design is not appealing, affecting overall satisfaction."
sock
design
aesthetic
"The tongue of the stealth fit edition is too elastic, leading to heel lift."
heel lift
fit problems
elastic tongue
"The fit in the stealth fit edition is not ideal for performance running."
performance
fit
secure fit
"The original version is preferred for better lockdown compared to the stealth fit edition."
lockdown
performance
fit
"The stealth fit version has a tongue that does not provide adequate support due to its thinness."
tongue
support issues
fit

transition (1)
transitions (1)
height (1)
flexibility (1)
heel support (1)
heel counter (1)
midsole width (1)
general (1)
Pros
"The shoe's cushioning provides a very stable and smooth transition, enhancing the running experience."
smooth transition
stability
comfortable
"Transitions between strides are smooth and stable, contributing to an enjoyable running experience."
smooth
stable
"The increased stack height improves stability and cushioning."
increased stack height
stability
cushioned
"Flex grooves in the outsole enhance adaptability to impact stresses."
flex grooves
impact adaptation
outsole design
"The improved heel counter provides better support and stability."
stability
heel counter
"The improved heel counter offers better support and comfort than previous versions."
heel counter
support
comfort
"The shoe has a broader midsole width, providing a stable landing platform for heel strikers."
broader width
landing platform
support
"The shoe is suitable for neutral runners, providing stability without excessive support requirements."
neutral runner
stability
ride quality
"The shoe provides valuable support for alignment during runs, making it suitable for various running styles."
support
alignment
"The wide base provides excellent stability during runs."
wide base
stability
"The GTS version provides a non-intrusive stability experience without feeling overly supportive."
stability
non-intrusive
support
Cons
"The shoe does not have a prominent forefoot rocker, making it feel flat."
forefoot
flat
transitions
"The stability features like side rails were not noticeable during running."
stability
side rails
performance
"The heel does not provide enough stability for walking comfortably."
walking
comfort
stability
"The heel is described as significantly curved which negatively impacts stability when walking."
walking
stability
design
"The shoe feels more flexible but less stable due to its semi-curved last."
flexibility
stability
design
"The stealth fit version lacks a good lockdown, making it less secure than the original version."
lockdown
security
stability issues
"The heel counter on the stealth fit version is flexible and may not provide adequate support."
heel counter
support
stability
"The drop height may not be suitable for minimalistic runners."
10 mm drop
minimalist
stability

traction (3)
wet conditions (1)
coverage (1)
durability (1)
stability (1)
tread (1)
wet surfaces (1)
aggressiveness (1)
Pros
"The RoadTack rubber outsole offers excellent grip, making it suitable for a variety of conditions, including wet surfaces."
grip
wet conditions
outsole durability
"The generous outsole coverage contributes to stability while running on uneven surfaces like gravel."
outsole coverage
stability
gravel running
"The outsole has been updated for added grip and durability on various terrains."
RoadTack
grip
durability
"The Brooks Ghost 15 has a highly aggressive tread, beneficial for durability and traction."
aggressive
tread
durability
"The shoe features improved grip compared to previous versions."
grip
outsole
silica
"The Glycerin 20 possesses a good level of rubber coverage on the outsole, ensuring reliable traction."
traction
outsole
reliability
"The redesigned outsole enhances grip, making it reliable on tougher terrains."
outsole design
grip
stability
"The Brooks shoe has an aggressive tread design that enhances grip and stability."
aggressive tread
grip
Cons
"Traction on wet surfaces is average, which could impact safety during rainy runs."
traction
wet
safety
"The tread is not aggressive enough for off-road conditions, leading to slipping concerns."
non-aggressive tread
slipping concern
"The tread is not thick or aggressive enough for varied terrains."
tread
off-road
slip risk

lightweight (2)
design (2)
breathability (2)
upgrade (1)
weight (1)
shopping (1)
stiffness (1)
safety (1)
Pros
"The Glycerin 21 is lighter than its predecessor, making it a more appealing choice for runners looking for reduced weight."
lightweight
weight
"The shoe is lightweight for the amount of cushioning it provides."
lightweight
cushion
easy miles
"The shoe is a significant improvement over its predecessor in terms of comfort and performance, making it a preferred choice for running."
improvement
better than predecessor
"The weight of the shoe is relatively light despite the increased midsole stack."
lightweight
high mileage
stack height
"The shoe's colorway and design are visually appealing."
aesthetic
colorway
"The shoe has an appealing aesthetic that enhances the overall running experience."
aesthetics
style
"The shopping experience on Amazon was noted as beneficial, allowing for easy returns and trials."
online shopping
Amazon Prime
easy returns
Cons
"Despite being somewhat lightweight, it is not the lightest running shoe available."
weight
lightweight
"The shoe lacks adequate breathability, which may lead to discomfort during longer runs."
breathability
discomfort
"The shoe lacks adequate breathability, making it less suited for hot summer runs."
ventilation
temperature
comfort
"The shoe is stiffer than some runners might prefer, impacting flexibility during runs."
outsole groove
flexibility
running comfort
"The absence of reflective elements detracts from its safety features, especially for night running."
reflective elements
visibility
"The original version is heavier than the stealth fit, which may deter some runners looking for a lightweight option."
weight
heavy
performance
"The limited color options are a drawback, especially for those who like variety."
color options
style
"The design of the sock was not favorable, affecting aesthetic preference."
sock design
aesthetic concern
"The reviewer expresses excitement about the shoe's look but only mentions the sole without going into detail."
aesthetics
lack of detail
"There is a limited range of color options available for the shoe."
color
variety

Model Updates

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Reviews

Read reviews about the Brooks glycerin stealthfit 21 from across the internet, including reviews from other runners on Fittir, wear testers from google & youtube, and more.

Reviews on Fittir (-)

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Wear-tester reviews (19)

4.3/5

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