Brooks Beast GTS 26 vs Adrenaline GTS 24: A Podiatrist Reads Both Spec Sheets
Nothing on this page has been measured by us. No caliper has touched either shoe, there is no score, and neither has earned the Podiatrist Tested seal. Every figure below is attributed to whoever published it — Brooks, a named retailer, or an independent lab. When we buy and test a pair, this comparison is replaced by measured data. How we test.
On this page
Both of these are Brooks stability shoes, and both are built on the same GuideRails support system — so the real question is not which brand, it is how much shoe you need under you. The Adrenaline GTS 24 is Brooks’ moderate, do-everything guided trainer; the Beast GTS 26 (sold as the Ariel GTS 26 for women) is the maximum-support, high-volume motion-control shoe at the top of the range.
The numbers, side by side
Model versions: the Brooks Adrenaline GTS 24 named on this page has since been superseded by the Brooks Adrenaline GTS 25. Nothing here has been swapped to the newer version — this page describes the model it was built on, and the newer one has its own review.
| Measurement | Beast GTS 26 | Adrenaline GTS 24 | What it means |
|---|---|---|---|
| Support role | Motion control / maximum support (Brooks) | Moderate stability (Brooks) | The Beast is the higher-support shoe of the two |
| Support hardware | GuideRails on a broad, high-volume platform (Brooks) | GuideRails, a medial post and a reinforced heel counter (Brooks) | Both guide the foot; the Adrenaline adds a traditional posted element, the Beast adds width and volume |
| Weight, men’s | ~354–357 g / 12.5–12.6 oz, size 9 (Running Warehouse) | 283 g / 10.0 oz stated (Brooks); 291 g / 10.3 oz measured (RunRepeat lab) | The Beast is roughly 65–75 g heavier per shoe |
| Heel stack | 38 mm (Running Warehouse) | 39 mm retailer; 39.0 mm measured (RunRepeat lab) | Nearly identical under the heel |
| Forefoot stack | 28 mm (Running Warehouse) | 27 mm retailer; 25.5 mm measured (RunRepeat lab) | Comparable; the Beast may sit slightly higher at the forefoot |
| Heel-to-toe drop | 10 mm (Running Warehouse) | 12 mm stated (Brooks); 13.5 mm measured (RunRepeat lab) | The Adrenaline runs 2–3.5 mm higher at the heel |
| Widths, men’s | D, 2E, 4E (Brooks) | Narrow, Medium, Wide, X-Wide (Brooks) | Only the Adrenaline offers a narrow; both reach extra-wide |
| Orthotic accommodation | “Accommodates orthotic inserts”; removable insole (Brooks) | Removable insole (Brooks) | Both take an aftermarket insole |
| APMA Seal of Acceptance | Yes — Beast GTS 26 and Ariel GTS 26 listed (APMA) | Not listed in our spec-analysis source | Recorded only where published |
| List price | $170 (Brooks) | $140 (Brooks) | The Beast costs $30 more |
Same GuideRails, two different amounts of shoe
Brooks builds both shoes on GuideRails, a support system that runs along the sides of the midsole and only engages when the knee or ankle travels past its normal path — it holds excess motion rather than propping the arch up the way an old medial post does. What changes between these two is not the guidance system, it is the platform underneath it. The Adrenaline GTS 24 keeps that platform moderate and pairs GuideRails with a traditional medial post and a reinforced heel counter, which is why Brooks positions it as an everyday guided trainer. The Beast GTS 26 widens and deepens the platform into a genuine motion-control shoe: more foam, a broader base and more room inside — the shoe Brooks points heavier runners and stronger overpronators toward.
What actually separates them
Three things do the work. Weight: on the retailer and lab figures above, the Beast is roughly 65–75 g heavier per shoe, a difference you feel on a long day on your feet more than in a short run. Drop: the Adrenaline sits 2–3.5 mm higher at the heel (12 mm stated, 13.5 mm on RunRepeat’s calipers) against the Beast’s 10 mm retailer figure, so it loads the forefoot a little less. Volume: the Beast’s reason to exist is room — a broader base and a deeper interior — which matters more to orthotic and brace users than the stack numbers alone suggest. Price splits them by $30.
Who each one is for
- You are a heavier runner or walker and want the most support and foam Brooks makes.
- You overpronate strongly, or a clinician has told you to look at motion control rather than moderate stability.
- You wear a bulky custom orthotic or a brace and keep running out of room.
- You want a 4E (men’s) width in a maximal shoe.
- You want everyday guided stability without the weight of a motion-control shoe.
- You are used to a higher-drop feel (12 mm or more).
- You need a narrow width — the Beast does not offer one.
- You want the lighter shoe and the lower price.
Both take an orthotic — but only one is built for a bulky one
Both shoes have a removable insole, so both will accept an over-the-counter or custom orthotic. The practical difference is volume. A custom device or a thick OTC insole raises the foot inside the shoe and eats depth; the Adrenaline’s moderate build can feel tight once a bulky orthotic goes in, whereas the Beast is designed with the extra interior room that orthotic and AFO users tend to need. If your orthotic is slim, the Adrenaline is fine; if it is bulky, or you have not measured it, the Beast is the safer starting point. We have not put a caliper to either interior, so treat this as a reading of design intent, not a measured depth.
Where to buy
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Read the full analysis of each
Common questions
Is the Brooks Beast just a bigger Adrenaline?
They share the GuideRails support system, but the Beast is a true motion-control shoe with a broader, higher-volume platform and more support, while the Adrenaline is a moderate everyday stability trainer. Same family, different amount of shoe.
Which is better for overpronation?
For moderate overpronation, the Adrenaline GTS 24’s GuideRails and medial post are usually enough. For strong overpronation, or when a clinician has recommended motion control, the Beast GTS 26 offers more. Neither has been tested on our bench, so this reflects how Brooks positions them, not a measured result.
Are they good for plantar fasciitis or standing all day?
Both are cushioned, supportive shoes that many people with plantar fasciitis and long-standing jobs get on well with, and both accept an orthotic. We have not scored either, and the right choice depends on your foot and your insole — see how we test.
Do both come in wide widths?
Yes. The Beast comes in D, 2E and 4E for men (B, D, 2E for women per Fleet Feet); the Adrenaline comes in Narrow, Medium, Wide and X-Wide per Brooks. Only the Adrenaline offers a narrow.
What we would need to settle this properly
To turn this into a real verdict we would buy both, weigh them at men’s 10, measure heel and forefoot stack with calipers, measure internal toe-box width and depth, check torsional rigidity and heel-counter stiffness by hand, and log miles on each. Until then, every number above belongs to Brooks, a named retailer, or RunRepeat’s lab, and this page compares published figures rather than tested ones.
Page type: spec comparison (neither tested) · Figures attributed to Brooks, Running Warehouse, Fleet Feet and RunRepeat’s independent lab · Last verified 2026-09-09 · Dr. Tom Biernacki, DPM (NPI 1821330051).
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