ASICS Gel-Kayano 32 vs 33: What Changed, and Should You Upgrade?
ASICS rebuilt the Kayano 33 around a new stability system and a softer layer of foam. In the lab it came out 3 mm lower at the heel and about a fifth softer, on the same drop and the same base.
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That makes the 33 the softer, lower Kayano and the 32 the firmer, more held one. If your Kayano 32 is working, above all for a foot that needs holding, buy another pair while ASICS still sells it.
This is a spec comparison. We have not measured, worn or scored either shoe. The brand figures below are ASICS’s own; the lab figures are RunRepeat’s, from one pair of each. We keep the two apart because they are not the same tier of evidence.
What ASICS says changed
ASICS released the Gel-Kayano 33 on 1 June 2026 and presents it as a new stability system under a softer ride. The 4D Guidance System of the Kayano 32 is replaced by what ASICS calls FLUIDSUPPORT, which it says “adapts to your changing biomechanical needs throughout each stride”, and a layer of FF BLAST MAX foam now sits over the FF BLAST PLUS the 32 was built from. The upper is redesigned. The stated drop is still 8 mm, the weight is within 2 g and the list price is $5 higher.
| Specification | Kayano 32 | Kayano 33 |
|---|---|---|
| List price | $165 | $170 |
| Heel-to-toe drop | 8 mm | 8 mm |
| Weight, men’s | 300 g (10.6 oz) | 298 g (10.5 oz) |
| Weight, women’s | 260 g (9.2 oz) | 259 g (9.1 oz) |
| Heel and forefoot stack | Not published by ASICS | Not published by ASICS |
| Midsole | FF BLAST PLUS | FF BLAST MAX over FF BLAST PLUS |
| Stability system | 4D Guidance System | FLUIDSUPPORT |
| Widths, men’s | Standard, Wide, Extra Wide | Narrow, Standard, Wide, Extra Wide |
| Widths, women’s | Narrow, Standard, Wide | Narrow, Standard, Wide |
| APMA Seal directory | Listed | Not listed |
ASICS US product pages and the Kayano 33 press release, read 28 September 2026. ASICS gives the weights without a size and publishes no stack heights; the 39/31 and 40/32 mm figures quoted elsewhere come from third-party listings. ASICS names its widths without letter codes. APMA listing as shown in the APMA’s own seal directory on the same day.
What the lab measured
RunRepeat cut, weighed and measured one pair of each. Most of the shoe is the same shoe: the same base width, the same torsional rigidity, three grams apart. Two things moved enough to matter to a foot, and they move together: the 33 sits lower, and it is much softer.
| Measurement | Kayano 32 | Kayano 33 | Change |
|---|---|---|---|
| Heel stack | 39.9 mm | 36.8 mm | 3.1 mm lower |
| Forefoot stack | 30.6 mm | 28.3 mm | 2.3 mm lower |
| Measured drop | 9.3 mm | 8.5 mm | 0.8 mm less |
| Weight | 295 g | 298 g | 3 g heavier |
| Midsole hardness (Asker C, higher is firmer) | 41.3 AC | 32.8 AC | About a fifth softer |
| Heel counter stiffness (1 to 5) | 5 | 4 | One step softer |
| Torsional rigidity | 20.2 Nm | 20.1 Nm | No real change |
| Force to bend the forefoot | 16.9 N | 19.7 N | Slightly stiffer |
| Midsole width, heel and forefoot | 97.2 / 119.8 mm | 97.1 / 120.7 mm | The same base |
| Toe-box width at the big toe | 73.9 mm | 72.4 mm | 1.5 mm narrower |
| Width at the widest point | 96.6 mm | 95.9 mm | 0.7 mm narrower |
| Toe-box height | 27.5 mm | 28.6 mm | 1.1 mm taller |
| Insole thickness | 4.9 mm | 5.2 mm | Both removable |
Source: RunRepeat lab, one pair of each, read 28 September 2026. Hardness is on the Asker C scale; across the 33 shoes on this site the same lab has measured on it, the median is 35.8. Its Kayano 33 figures are from its July 2026 review.
What a foot and ankle surgeon takes from this
The heel came down; the drop stayed where it was. The 33 stands 3.1 mm lower under the heel and 2.3 mm lower under the forefoot, so the difference between the two, the drop, moved by less than a millimetre. For a heel, an Achilles or a plantar fascia, that is the same shoe. The 33 is simply closer to the ground, and closer to its own label: ASICS says 8 mm for both, and the lab measured 9.3 on the 32 and 8.5 on the 33.
Softer is not the same as more stable. The Kayano is a stability shoe, and the 32 was one of the firmest shoes on this site: of the 33 shoes the lab has measured on the same hardness scale, only seven were firmer. The 33 sits at the edge of the softer third, with eleven softer. Its twisting stiffness and its base width are unchanged and its heel counter is a step less stiff. A softer platform lets a foot that rolls in hard sink further before the shoe pushes back. For a flat foot that collapses, a painful posterior tibial tendon or a heavier runner, the firmer 32 is the more supportive of the two on paper, whatever the name of the stability system. Stand on one leg in each in the shop and watch which lets the arch drop further.
For everyone else, the 33 is the kinder ride. If the 32 felt hard or harsh on long walks, the 33’s foam is the change you wanted. The forefoot is a little stiffer to bend, a small help for a stiff big toe joint. Toe room is a wash: 1.5 mm narrower at the big toe and 1.1 mm taller, differences small enough that two pairs of the same shoe could vary as much. Across the ASICS range the trend runs the same way: most new versions are a little narrower at the toes than the ones they replaced; see do ASICS have a wide toe box?
Should you upgrade?
Stay with the Kayano 32 if…
- It already works for you. A shoe that has settled a problem is worth more than a new model year.
- You need a firm, held platform: a flat foot that collapses, a posterior tibial tendon problem, or more body weight to carry.
- You want a shoe in the APMA’s Seal directory: the 32 is listed, the 33 not yet.
- You can still find your size: ASICS still sells the 32 at $165.
Buy the Kayano 33 if…
- You found the 32 hard, or you want a softer shoe for long walks and slower days.
- You want a lower heel without changing the drop.
- You need a men’s Narrow, which only the 33 offers.
- You are buying your first Kayano. It is the one ASICS will keep in stock.
Orthotics and inserts
Both insoles lift out, at 4.9 and 5.2 mm, and the 33’s toe box measured 1.1 mm taller, which helps a full-length orthotic a little. Neither ASICS nor the lab publishes how much depth is left once the insole is out, which is the figure that decides whether a custom orthotic fits without lifting your heel out of the collar. Take the insole out in the shop and check; our Orthotic Volume Rating explains the one-minute test.
Questions runners ask
Is the ASICS Gel-Kayano 33 better than the 32?
It is softer and lower, not better for everyone. The lab measured the 33 about a fifth softer and 3.1 mm lower at the heel, with the same drop, the same twisting stiffness and the same base width. If you want a firmer, more held stability shoe, the 32 is the stronger of the two on paper; if the 32 felt hard, the 33 is the upgrade.
Did ASICS change the drop on the Kayano 33?
No. ASICS states 8 mm for both. The lab measured 9.3 mm on the 32 and 8.5 mm on the 33, so the 33 is slightly closer to its label, and for a heel or Achilles problem the two behave the same.
Is the Kayano 33 softer than the 32?
Yes, clearly. The lab measured its midsole at 32.8 on the Asker C scale against 41.3 for the 32, about a fifth softer. The 32 was one of the firmest shoes on this site; the 33 sits at the edge of the softer third.
Is the Kayano 33 wider than the 32?
No. The base is the same width and the toe box measured 1.5 mm narrower at the big toe and 0.7 mm narrower at the widest point, differences small enough to vary between pairs. ASICS offers the 33 in a men’s Narrow as well as Wide and Extra Wide.
Is the ASICS Gel-Kayano 32 discontinued?
Not yet. ASICS still listed the 32 at $165 on its US site on 28 September 2026, alongside the 33 at $170. Expect sizes and widths to thin out as retailers clear it.
What is FLUIDSUPPORT on the Kayano 33?
It is the name ASICS gives the stability system that replaces the 4D Guidance System of the 32; ASICS says it “adapts to your changing biomechanical needs throughout each stride”. ASICS publishes no measurement of what it does. The lab found the same twisting stiffness as the 32, a softer midsole and a heel counter one step less stiff.
Read the full analysis
Our Gel-Kayano 32 spec analysis has the full table for the 32, and we compare it with a rival stability shoe in Kayano 32 vs Adrenaline GTS 24. For heel pain, read the Kayano 32 for plantar fasciitis; for a foot that rolls in, our guides to shoes for overpronation and flat feet. The heel-to-toe drop chart has every shoe on the site.
- ASICS US product pages, read 28 September 2026: Gel-Kayano 32, men’s, women’s; Gel-Kayano 33, men’s, women’s.
- ASICS, press release for the Gel-Kayano 33, 5 May 2026.
- RunRepeat lab reviews: Gel-Kayano 32 and Gel-Kayano 33.
- APMA Seal of Acceptance directory, ASICS America.
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