On
On Cloudhorizon
On Cloudhorizon. 35.5mm stack, 312g. 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? 35.5 mm stack, cushion 5/5
Descent tolerance
Does it save your toenails on long descents? 26.4 mm forefoot, heel counter 3/5
Swelling room
Room to grow when your feet swell? 28.1 mm toebox height
Grit resistance
Does dust stay outside the shoe? 3 BR breathability
Hot-day comfort
How well does it breathe in heat? 3 BR / ?% drying
Achilles-friendly
Kind to a cranky achilles? 9.1 mm drop, heel counter 3/5
Full specs
Drop
9.1 mm
Heel stack
35.5 mm
Forefoot stack
26.4 mm
Weight
312 g
Lug depth
2.5 mm
Plate
No
Waterproof
No
Lab measurements
Fit intelligence
Toebox width
Narrow toebox (75.9 mm vs 96 mm median)
Toebox height
Tall toebox (28.1 mm vs 25 mm median)
Runs small. Consider a half size up.
Fit numbers from the lab. Swell guidance: foot care.
Questions before you race
Is the On Cloudhorizon good for 100-mile races?
Elite. 35.5 mm stack, cushion 5/5. 100-miler readiness score 89/100.
Does the On Cloudhorizon fit wide feet?
No. Toebox is 75.9 mm which is narrow. Look elsewhere if you need width.
What is the drop on the On Cloudhorizon?
9.1 mm, with a 35.5 mm heel stack and 26.4 mm forefoot.
Is the On Cloudhorizon good on wet rock?
Lab traction has not been measured for this model yet.
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swellingRoom: 100/100 (Elite)
descentTolerance: 100/100 (Elite)
gritIngressRisk: 97/100 (Elite)
hotFootScore: 22/100 (Weak)
achillesFriendlyScore: 57/100 (Solid)
hundredMilerReadiness: 89/100 (Elite)