On
On Cloudmonster 3
On Cloudmonster 3. 38.6mm stack, 301g. 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? 38.6 mm stack, cushion 5/5
Descent tolerance
Does it save your toenails on long descents? 32.2 mm forefoot, heel counter 4/5
Swelling room
Room to grow when your feet swell? 25.4 mm toebox height
Grit resistance
Does dust stay outside the shoe? 2 BR breathability
Hot-day comfort
How well does it breathe in heat? 2 BR / ?% drying
Achilles-friendly
Kind to a cranky achilles? 6.4 mm drop, heel counter 4/5
Full specs
Drop
6.4 mm
Heel stack
38.6 mm
Forefoot stack
32.2 mm
Weight
301 g
Plate
No
Waterproof
No
Lab measurements
| Measurement | Value |
|---|---|
| Traction (CoF) | 0.51 |
| Breathability | 2 BR |
| Flexibility | 20.5 N |
| Torsional rigidity | 16.70 Nm |
| Heel counter | 4/5 |
| Energy return | 58.7 % |
| Shock absorption | 123 SA |
| Midsole softness | 49.9 HA |
| Outsole thickness | 3.2 mm |
| Tongue padding | 5.3 mm |
| Insole removable | Yes |
| Insole thickness | 4.4 mm |
| Reflective elements | Yes |
Fit intelligence
Toebox width
Narrow toebox (71.0 mm vs 96 mm median)
Toebox height
Category-average height (25.4 mm vs 25 mm median)
True to size.
Fit numbers from the lab. Swell guidance: foot care.
Questions before you race
Is the On Cloudmonster 3 good for 100-mile races?
Elite. 38.6 mm stack, cushion 5/5. 100-miler readiness score 89/100.
Does the On Cloudmonster 3 fit wide feet?
No. Toebox is 71.0 mm which is narrow. Look elsewhere if you need width.
What is the drop on the On Cloudmonster 3?
6.4 mm, with a 38.6 mm heel stack and 32.2 mm forefoot.
Is the On Cloudmonster 3 good on wet rock?
Traction coefficient of friction on wet lab surface: 0.51. Solid grip on wet rock.
Manufacturer specs · Retailer listing
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swellingRoom: 100/100 (Elite)
descentTolerance: 100/100 (Elite)
gritIngressRisk: 86/100 (Elite)
hotFootScore: 22/100 (Weak)
achillesFriendlyScore: 62/100 (Solid)
hundredMilerReadiness: 89/100 (Elite)