ASICS
ASICS Metaspeed RAY
ASICS Metaspeed RAY. 39.8mm stack, 129g. Retailer specs verified on Running Warehouse.
PR Run scores
PR Run derived fit scores
100-miler readiness
Will this shoe survive a hundred-mile night? 39.8 mm stack, cushion 5/5
Descent tolerance
Does it save your toenails on long descents? 30 mm forefoot, heel counter 1/5
Swelling room
Room to grow when your feet swell? 27.0 mm toebox height
Grit resistance
Does dust stay outside the shoe? 4 BR breathability
Hot-day comfort
How well does it breathe in heat? 4 BR / ?% drying
Achilles-friendly
Kind to a cranky achilles? 9.8 mm drop, heel counter 1/5
Full specs
Drop
9.8 mm
Heel stack
39.8 mm
Forefoot stack
30 mm
Weight
129 g
Plate
No
Waterproof
No
Lab measurements
| Measurement | Value |
|---|---|
| Traction (CoF) | 0.70 |
| Breathability | 4 BR |
| Flexibility | 16.3 N |
| Torsional rigidity | 10.80 Nm |
| Heel counter | 1/5 |
| Energy return | 78.0 % |
| Shock absorption | 170 SA |
| Midsole softness | 28.6 HA |
| Outsole thickness | 0.9 mm |
| Tongue padding | 0.4 mm |
| Insole removable | Yes |
| Insole thickness | 7.6 mm |
| Reflective elements | No |
Fit intelligence
Toebox width
Narrow toebox (69.6 mm vs 96 mm median)
Toebox height
Slightly tall (27.0 mm vs 25 mm median)
Runs large. Consider a half size down.
Fit numbers from the lab. Swell guidance: foot care.
Questions before you race
Is the ASICS Metaspeed RAY good for 100-mile races?
Great. 39.8 mm stack, cushion 5/5. 100-miler readiness score 69/100.
Does the ASICS Metaspeed RAY fit wide feet?
No. Toebox is 69.6 mm which is narrow. Look elsewhere if you need width.
What is the drop on the ASICS Metaspeed RAY?
9.8 mm, with a 39.8 mm heel stack and 30 mm forefoot.
Is the ASICS Metaspeed RAY good on wet rock?
Traction coefficient of friction on wet lab surface: 0.70. Elite grip on wet rock.
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swellingRoom: 100/100 (Elite)
descentTolerance: 92/100 (Elite)
gritIngressRisk: 65/100 (Great)
hotFootScore: 23/100 (Weak)
achillesFriendlyScore: 69/100 (Great)
hundredMilerReadiness: 69/100 (Great)