Altra
Altra Experience Flow 2
Altra Experience Flow 2. 30.3mm stack, 235g. 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? 30.3 mm stack, cushion 4/5
Descent tolerance
Does it save your toenails on long descents? 25.9 mm forefoot, heel counter 3/5
Swelling room
Room to grow when your feet swell? 24.6 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? 4.4 mm drop, heel counter 3/5
Full specs
Drop
4.4 mm
Heel stack
30.3 mm
Forefoot stack
25.9 mm
Weight
235 g
Plate
No
Waterproof
No
Lab measurements
| Measurement | Value |
|---|---|
| Traction (CoF) | 0.55 |
| Breathability | 3 BR |
| Flexibility | 10.0 N |
| Torsional rigidity | 11.20 Nm |
| Heel counter | 3/5 |
| Energy return | 60.3 % |
| Shock absorption | 127 SA |
| Midsole softness | 30.9 HA |
| Outsole thickness | 3.1 mm |
| Tongue padding | 10.3 mm |
| Insole removable | Yes |
| Insole thickness | 4.4 mm |
| Reflective elements | Yes |
Fit intelligence
Toebox width
Narrow toebox (82.6 mm vs 96 mm median)
Toebox height
Category-average height (24.6 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 Altra Experience Flow 2 good for 100-mile races?
Great. 30.3 mm stack, cushion 4/5. 100-miler readiness score 69/100.
Does the Altra Experience Flow 2 fit wide feet?
No. Toebox is 82.6 mm which is narrow. Look elsewhere if you need width.
What is the drop on the Altra Experience Flow 2?
4.4 mm, with a 30.3 mm heel stack and 25.9 mm forefoot.
Is the Altra Experience Flow 2 good on wet rock?
Traction coefficient of friction on wet lab surface: 0.55. Elite grip on wet rock.
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swellingRoom: 100/100 (Elite)
descentTolerance: 77/100 (Great)
gritIngressRisk: 100/100 (Elite)
hotFootScore: 22/100 (Weak)
achillesFriendlyScore: 80/100 (Elite)
hundredMilerReadiness: 69/100 (Great)