On
On Cloudrunner
On Cloudrunner. 33.3mm stack, 294g. 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? 33.3 mm stack, cushion 4/5
Descent tolerance
Does it save your toenails on long descents? 20.9 mm forefoot stack
Swelling room
Room to grow when your feet swell? 33.3 mm heel stack
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? 12.4 mm drop, heel counter 2/5
Full specs
Drop
12.4 mm
Heel stack
33.3 mm
Forefoot stack
20.9 mm
Weight
294 g
Plate
No
Waterproof
No
Lab measurements
Fit intelligence
Runs small. Consider a half size up.
Fit numbers from the lab. Swell guidance: foot care.
Questions before you race
Is the On Cloudrunner good for 100-mile races?
Great. 33.3 mm stack, cushion 4/5. 100-miler readiness score 78/100.
Does the On Cloudrunner fit wide feet?
Toebox width has not been measured in the lab yet.
What is the drop on the On Cloudrunner?
12.4 mm, with a 33.3 mm heel stack and 20.9 mm forefoot.
Is the On Cloudrunner good on wet rock?
Traction coefficient of friction on wet lab surface: 0.36. Marginal grip on wet rock.
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swellingRoom: 66/100 (Great)
descentTolerance: 47/100 (Passable)
gritIngressRisk: 100/100 (Elite)
hotFootScore: 23/100 (Weak)
achillesFriendlyScore: 48/100 (Passable)
hundredMilerReadiness: 78/100 (Great)