What replaced the Brooks Adrenaline GTS 20?
Updated July 29, 2026. Specs are men's US 9.
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THE SHORT ANSWER
The Adrenaline GTS 21 replaced the GTS 20 in November 2020. It extended the soft DNA Loft foam through the full length of the midsole, put on a lighter and more breathable upper, and kept the 12 mm drop and $130 price.
At a glance
- The Adrenaline GTS 21 is 0.2 oz lighter
- Drop is unchanged at 12 mm
- New midsole foam
Every spec side by side, with the reason behind each change: Adrenaline GTS 20 vs 21.
Stay on your shoe, or switch?
Refined, same shoeThe 21 took the best-selling stability shoe and made it softer and smoother without moving anything that mattered. Reviewers called the support invisible until needed, which is exactly the GuideRails pitch. Many longtime wearers still point to this era as the Adrenaline at its best.
Stick with the Adrenaline GTS 20 if
- You liked the slightly firmer, more traditional feel of the 20
- Leftover 20s show up at closeout prices in your size
Old stock is gone; see alternatives below.
Move to the Adrenaline GTS 21 if
- You want a softer, smoother ride with the same GuideRails support
- The 20 felt disjointed moving from heel to forefoot
Where the Brooks Adrenaline GTS is now
Four generations separate the Brooks Adrenaline GTS 20 from the Adrenaline GTS 25 (2025), so the gap is wider than any single update suggests:
- Weight is unchanged
- 1 mm more heel stack
- Drop moved from 12 mm to 10 mm
- New midsole foam
- List price up $15
What loyalists said about the update
Reception was warm across the board. Fleet Feet testers called it supportive without being noticeably corrective, and the full-length DNA Loft fixed the slightly disjointed heel-to-toe feel of the 20. There was no backlash to speak of, a rarity for a shoe this popular.
Still want the original?
Buy remaining Adrenaline GTS 20 stock
Old stock goneAmazon's stock of the Brooks Adrenaline GTS 20is gone in both men's and women's sizes, and discontinued stock does not come back. The best current match is the Asics Gel-Kayano 33.
Ready to move on?
Beyond the Adrenaline GTS 21, these come closest to what the Adrenaline GTS 20 did.
- 10.5 oz
- 8 mm drop
- 39 mm heel
- $170 list
The Kayano is the other default stability recommendation and the most common head-to-head. It is taller, softer, plusher, and $25 more, with guidance built into the shape of the platform rather than side rails.
Against your Brooks Adrenaline GTS 20: the same weight, 3 mm more heel stack, 4 mm less drop, $40 more at list.
- 10.2 oz
- 10 mm drop
- 36 mm heel
- $150 list
The Ghost is the Adrenaline without the GuideRails: same brand, similar fit, same foam generation. Runners whose stability needs were mild often move over and miss nothing.
Against your Brooks Adrenaline GTS 20: 0.4 oz lighter, 2 mm less drop, $20 more at list.
- 10.4 oz
- 10 mm drop
- 38 mm heel
- $145 list
The Structure is the Nike counterpart, a firmer, geometry-based stability workhorse that went through the same post-deleting transition. It is the cross-shop for runners who prefer a snappier, more traditional Nike fit.
Against your Brooks Adrenaline GTS 20: 0.2 oz lighter, 2 mm more heel stack, 2 mm less drop, $15 more at list.
Questions runners ask
- Is the Brooks Adrenaline GTS 20 still available?
- No. Amazon's stock of the Brooks Adrenaline GTS 20 is gone in both men's and women's sizes, and old-model stock does not come back. Your move is the successor or a close alternative.
- Is the Adrenaline GTS 21 a downgrade from the Brooks Adrenaline GTS 20?
- No. Most runners rate the Adrenaline GTS 21 as the same shoe done slightly better. The changes are real but none of them alter what the shoe is.
- How much lighter is the Adrenaline GTS 21?
- 0.2 oz lighter in a men's US 9: 10.4 oz against the Brooks Adrenaline GTS 20's 10.6 oz.
- Is the Brooks Adrenaline GTS still made?
- Yes. The current version is the Brooks Adrenaline GTS 25, released in 2025, 5 versions on from the Brooks Adrenaline GTS 20.
- What is the closest current alternative to the Brooks Adrenaline GTS 20?
- The Asics Gel-Kayano 33. The Kayano is the other default stability recommendation and the most common head-to-head. It is taller, softer, plusher, and $25 more, with guidance built into the shape of the platform rather than side rails.