Brooks
Glycerin Flex
Product Judgment
Strong
8.2
Category: Max Cushioned
Release year: 2026
Evidence base: Extensive
Reviewers agree on comfort and ride, differ on fit and flexibility.
Price Judgment
Reasonable
Common retail price: ~$170
Availability: Widely Available
Based on manual research as of Jul 29, 2026
Description
Innovative max-cushion trainer blending plush comfort with enhanced flexibility. Sits between traditional Glycerin and Glycerin Max in Brooks' lineup. Receives strong marks for premium upper and smooth, controlled ride.
Delivers a soft, fluid ride with less bulk than typical max-cushion shoes. Flex grooves and dynamic midsole encourage natural movement and smooth transitions. Secure, close fit enhances control but limits toe splay. Ride feels protective and stable, though not especially lively.
Ideal for daily training, long runs, and recovery sessions where comfort and control are priorities. Best suited for runners with narrower feet or those seeking a snug, secure fit. Less suited for speedwork or racing due to muted energy return. Offers a fresh, versatile option for those wanting max cushioning without excess bulk.
Performance Scores
Comfort
9Plush cushioning and premium knit upper deliver high comfort for daily and long runs.
Energy Return
6Midsole prioritizes shock absorption over bounce, resulting in moderate energy return.
Stability
8Broad midfoot platform and secure fit provide above-average stability for a max-cushion shoe.
Durability
7Durable upper and moderate outsole rubber offer good but not outstanding wear resistance.
Fun to Ride
7Smooth, natural ride feels fluid but lacks a lively or energetic sensation.
Run Fitness
Daily
9Excels in daily runs with plush comfort and smooth transitions.
Long
8Cushioning and stability support long runs, especially for lighter runners.
Tempo
6Flexible design allows moderate pace, but limited energy return holds it back at speed.
Race
4Weight and muted rebound make it unsuited for racing efforts.
Recovery
8Soft landings and premium fit provide comfort for easy recovery runs.
Pros & Cons
- Plush, premium cushioning
- Flexible, natural ride
- Breathable, durable knit upper
- Secure fit for narrow feet
- Limited energy return
- Narrow forefoot fit
- Minor fit-related discomfort
Abundant, soft cushioning delivers high comfort for daily and long-distance runs.
Midsole flex grooves create a more natural, less bulky ride than typical max-cushion shoes.
Engineered knit upper offers excellent breathability and long-term durability.
Snug, secure fit especially suits runners with narrower feet seeking a close feel.
Midsole foam absorbs shock well but lacks the bounce found in some competitors.
Snug forefoot and low toe box limit comfort for wide-footed runners.
Some users report rubbing or blisters at the heel and under the big toe.
Specifications
Best for paces
5:30–7:30 min/km
Drop
6 mm
Stack height
36 mm heel / 30 mm forefoot
Weight
258 g
Drop
6 mm
Stack height
36 mm heel / 30 mm forefoot
Weight
258 g
Pronation
N/A
Width
medium
Terrain
Road
Technologies
DNA Tuned midsole, FlexZone midfoot groove, Engineered knit upper
Plate
no
Best for paces
5:30–7:30 min/km
Comparable Models
Brooks Glycerin 23 offers a plusher, more traditional max-cushion ride but lacks the Flex's flexibility and natural feel.
View details
Brooks Glycerin Max 2 is heavier and more protective, with a bulkier ride and less flexibility.
View details
Brooks Ghost 17 delivers a firmer, more responsive ride and a roomier fit, but less plush cushioning.
View details
ASICS Gel-Nimbus 27 provides a softer, more luxurious upper and higher energy return, but is heavier.
View details
Hoka Clifton 10 is lighter and offers a bouncier ride, but with less upper luxury and a looser fit.
View details
Saucony Triumph 23 features a roomier fit and higher energy return, but less natural flexibility.
View details
New Balance Fresh Foam X More v6 offers similar max cushioning with a wider, more accommodating fit.
View details