Review
ASICS GEL-Resolution X review
The most thoroughly measured shoe on this site, and the numbers are emphatic in one direction and unforgiving in another.
By Janet H.Updated
The short answer
RunRepeat score the GEL-Resolution X at 90 and measure 5/5 for both torsional rigidity and heel counter stiffness, a 90.4 HC outsole with only 0.6 mm wear, and 98 SA of heel shock absorption. It weighs 14.7 oz / 417 g, which is among the heaviest tennis shoes they have tested.
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Our picks
| # | Product | Best for | Score | Price |
|---|---|---|---|---|
| 1 |  ASICS GEL-Resolution XOur verdict | Players who need maximum stability | 8.95 criteria |
The picks in detail
01ASICS GEL-Resolution X
Our verdictBest for: Players who need maximum stability
Perfect scores on the two measurements that matter most for a court shoe: 5/5 torsional rigidity from the Dynawall TPU shank and 5/5 heel counter stiffness. Those are what stop a foot inverting when you plant hard, which is the ankle-sprain mechanism.
The durability figures are equally strong. RunRepeat measure the outsole at 90.4 HC with only 0.6 mm of wear after their abrasion test, and score both toe guard and toebox durability at 5/5.
The price is stated plainly in their data: 14.7 oz / 417 g in a men's 9, one of the heaviest tennis shoes they have tested, and energy return of only 46.6% at the heel — a grounded, low-energy ride rather than a springy one.
Our score
- Lateral stability
- 10.0
- Cushioning
- 8.5
- Outsole durability
- 9.5
- Fit accommodation
- 8.0
- Lightness
- 3.5
- Overall
- 8.9
Verified specs
- RunRepeat score
- 90 — Best Stability
- Weight
- 14.7 oz / 417 g (men's 9)
- Heel / forefoot stack
- 30.8 mm / 21.9 mm
- Drop
- 8.9 mm
- Torsional rigidity
- 5/5
- Heel counter stiffness
- 5/5
- Heel shock absorption
- 98 SA
- Outsole wear
- 0.6 mm depth, 90.4 HC
Specs as published by RunRepeat, checked September 2026.
Buy if
- You have rolled an ankle before
- You overpronate or have flat feet
- You wear outsoles out quickly
Pass if
- Weight is a priority for you
- You have long toes rather than a wide forefoot
- You want a responsive, springy ride
The lab data
| Measurement | Value | What it means |
|---|---|---|
| Weight | 14.7 oz / 417 g | One of the heaviest RunRepeat have tested |
| Heel / forefoot stack | 30.8 mm / 21.9 mm | 8.9 mm drop |
| Torsional rigidity | 5/5 | Maximum — resists twisting under lateral load |
| Heel counter stiffness | 5/5 | Maximum — holds the heel bone in place |
| Heel shock absorption | 98 SA | Strong, though not the highest measured |
| Energy return | 46.6% heel / 46.1% forefoot | Grounded, low-energy ride |
| Outsole | 90.4 HC, 0.6 mm wear | Among the most durable measured |
| Forefoot traction | 0.89 friction coefficient | High |
| Toebox at big toe | 66.6 mm | Narrow — the shoe tapers |
| Flexibility | 18.7 N to bend | Slightly stiffer than average |
The fit, read carefully
This shoe appears in RunRepeat's wide-feet catalog and they describe it as suiting players with wide feet — and it measures only 66.6 mm at the big toe, which they classify as narrow.
Both things are true. The shoe is generous across the ball of the foot and tapers toward the toes. If your issue is forefoot girth, it fits; if your issue is toe length, it does not.
That distinction is why RunRepeat measure two separate points, and it is the most useful thing on this page for anyone who has bought a wide shoe and still had their big toe rubbing. Best tennis shoes for wide feet covers the alternatives.
Who it suits
- Players with ankle history. RunRepeat state it explicitly: extra stability for flat feet, overpronation or a past ankle injury.
- Baseline grinders. Maximum support and longevity, at the cost of speed.
- Players who destroy outsoles. 90.4 HC with 0.6 mm wear is at the top of what has been measured.
- Heavier players. More mass through the shoe makes structure matter more.
Who it does not
- Fast, light movers. 417 g is a lot to carry, and the ASICS Solution Speed FF 4 at 337 g gives up structure to save 80 g.
- Players who want energy return. 46.6% at the heel is a grounded ride by design.
- Players with long toes. The 66.6 mm big-toe measurement is the constraint.
- Hot-weather players. A heavy, structured shoe runs warm.
Alternatives
| If you want | Consider | Why |
|---|---|---|
| A wider toebox | ASICS Court FF 3 | 101.8 mm widest point, RunRepeat's top score at 93 |
| Less weight | ASICS Solution Speed FF 4 | 337 g, 1.11 traction |
| More cushioning | New Balance CT-Rally v2 | 116 SA heel, 33.3 mm stack, 5/5 torsional |
| The clay version | ASICS GEL-Resolution 9 Clay | 0.82 clay traction, six-month guarantee |
| Lower price | K-Swiss Hypercourt Express 2 | 86 score at $110 |
How this review was written
We did not hit with this product. Racket & Rally does not run a physical test lab, and nothing on this page is written as though we did.
What this review contains instead: the published specification from the retailer listing cited at the foot of the page, an explanation of what those numbers mean for different players, and a clear statement of who the product suits and who it does not. Every figure is quoted from a source we retrieved. Our full selection criteria set out the method.
Common questions
Is the ASICS GEL-Resolution X good for ankle support?
It is the best-measured option available. RunRepeat record 5/5 for both torsional rigidity and heel counter stiffness — the two properties that stop a foot inverting under lateral load.
How heavy is the GEL-Resolution X?
14.7 oz / 417 g in a men's 9, which RunRepeat describe as one of the heaviest tennis shoes they have tested. That weight is the structure, and the structure is the point.
Is the GEL-Resolution X wide?
Wide at the ball of the foot — it appears in RunRepeat's wide-feet catalog — and narrow at the big toe, where it measures 66.6 mm. If your problem is forefoot girth it fits; if it is toe length it does not.
How durable is the GEL-Resolution X outsole?
Among the most durable measured: 90.4 HC hardness with only 0.6 mm of wear in RunRepeat's abrasion test, plus 5/5 for toe guard and toebox durability.
Is there a clay version?
The GEL-Resolution 9 Clay is the clay-outsole model, scored 89 by RunRepeat with a 0.82 traction coefficient on clay and a six-month outsole guarantee.
Read next
Sources
- 01RunRepeat — ASICS GEL-Resolution X lab review
- 02RunRepeat — Best Hard Court Tennis Shoes
- 03RunRepeat — Wide tennis shoes catalog
- 04RunRepeat — ASICS GEL-Resolution 9 Clay lab review
Every source above was retrieved while writing this page. Specifications are quoted from the listing or manufacturer page cited, not from memory.