Daily trainer · Stability · Road · 9.9 oz · 28/18mm stack · 10mm drop
Discontinued — we no longer see this shoe in stock. The Brooks Glycerin GTS 24 replaced it
How it ranks
The Brooks Glycerin GTS 21’s rating is an early estimate. We’ve collected 7 runner reviews so far, with product line history and external ratings also informing the score.
Confidence
How settled the rating is against every other rated shoe. A shoe can rate high on confidence with relatively few reviews of its own when its product line has a long record and external ratings from retailer sites agree. Confidence is low when we have few ratings or when runners disagree.
Confidence
81 Moderate
External retailer ratings
We break apart ratings from mass-market retailers and specialty running shops since they serve different audiences.
The middle of the bar marks the typical shoe at each type of retailer. The dot shows where this shoe ranks in comparison.
Based on
The bars show roughly how much each source contributes to this shoe’s rating. Their influence depends on how many reviews we’ve collected, how many earlier versions are in the product line, and the external ratings available.
“Great option for people battling shin splints and stress fractures”
“Arch support is incredible in comparison to others I have owned”
“Essentially no pain in this shoe”
“Stability rails to prevent overpronation”
50% 3/6
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Prices updated daily. Last checked Oct 22.
Rating & Confidence vs. other shoes for sale
Each dot is one rated shoe for sale, placed by its rating and by how much evidence sits behind it. Shoes toward the top right are both well rated and well established.
Better Shoes Rating
Each dot is one version of the Glycerin GTS, placed by its rating and release year. The gold dot is this shoe.
Release year
2025 · 0 reviews
74 Decent
0 Confidence
2026 · 5 reviews
88 Good
70 Confidence
2025 · 1 review
85 Good
72 Confidence
Glycerin GTS 21 This shoe
2023 · 7 reviews
79 Decent
81 Confidence
2022 · 11 reviews
81 Good
87 Confidence
2021 · 3 reviews
82 Good
82 Confidence
Sizing and ride details at a glance.
1/5
Overall
Sorry but it didn't work out for me.
Anonymous runner · Dec 10, 2024
12 mpw training for a half marathon came from the HOKA Bondi 8
5/5
Overall
Have struggled with shin pain in the past—essentially no pain in this shoe. Of course there are probably conflating factors, but I can at least say this shoe doesn't contribute to shin pain. I think a combination of the stability rails to prevent overpronation and, counterintuitively, a stiffer (but decently padded) undersole to disincentivize overstriding and excessive tibialis breaking forces makes this a great option for people who are battling shin splints and stress fractures.
mitrunner · Oct 23, 2024
50 mpw training for 5K and 10K came from the HOKA Clifton 9
5/5
Overall
Great shoe. Very comfortable. arch support is incredible in comparison to others I have owned
Anonymous runner · Jun 25, 2024
20 mpw training for 5K and 10K came from the Brooks Adrenaline GTS 20
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