On
On Cloudflow 5
On Cloudflow 5. 32.8mm stack, 271g. 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? 32.8 mm stack, cushion 4/5
Descent tolerance
Does it save your toenails on long descents? 28.7 mm forefoot, heel counter 3/5
Swelling room
Room to grow when your feet swell? 24.5 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? 4.1 mm drop, heel counter 3/5
Full specs
Drop
4.1 mm
Heel stack
32.8 mm
Forefoot stack
28.7 mm
Weight
271 g
Plate
No
Waterproof
No
Lab measurements
| Measurement | Value |
|---|---|
| Traction (CoF) | 0.52 |
| Breathability | 2 BR |
| Flexibility | 20.7 N |
| Torsional rigidity | 18.40 Nm |
| Heel counter | 3/5 |
| Energy return | 46.9 % |
| Shock absorption | 123 SA |
| Midsole softness | 48.3 HA |
| Outsole thickness | 2.7 mm |
| Tongue padding | 6.4 mm |
| Insole removable | Yes |
| Insole thickness | 4.4 mm |
| Reflective elements | Yes |
Fit intelligence
Toebox width
Narrow toebox (77.2 mm vs 96 mm median)
Toebox height
Category-average height (24.5 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 Cloudflow 5 good for 100-mile races?
Great. 32.8 mm stack, cushion 4/5. 100-miler readiness score 73/100.
Does the On Cloudflow 5 fit wide feet?
No. Toebox is 77.2 mm which is narrow. Look elsewhere if you need width.
What is the drop on the On Cloudflow 5?
4.1 mm, with a 32.8 mm heel stack and 28.7 mm forefoot.
Is the On Cloudflow 5 good on wet rock?
Traction coefficient of friction on wet lab surface: 0.52. Solid grip on wet rock.
Manufacturer specs · Retailer listing
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swellingRoom: 100/100 (Elite)
descentTolerance: 85/100 (Elite)
gritIngressRisk: 90/100 (Elite)
hotFootScore: 22/100 (Weak)
achillesFriendlyScore: 82/100 (Elite)
hundredMilerReadiness: 73/100 (Great)