Altra
Altra Superior 6
Altra Superior 6. 22.1mm stack, 272g. 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? 22.1 mm stack, cushion 2/5
Descent tolerance
Does it save your toenails on long descents? 22 mm forefoot, heel counter 2/5
Swelling room
Room to grow when your feet swell? 24.9 mm toebox height
Grit resistance
Does dust stay outside the shoe? 5 BR breathability
Hot-day comfort
How well does it breathe in heat? 5 BR / ?% drying
Achilles-friendly
Kind to a cranky achilles? 0.1 mm drop, heel counter 2/5
Full specs
Drop
0.1 mm
Heel stack
22.1 mm
Forefoot stack
22 mm
Weight
272 g
Lug depth
3.3 mm
Plate
No
Waterproof
No
Lab measurements
Fit intelligence
Toebox width
Narrow toebox (82.4 mm vs 96 mm median)
Toebox height
Category-average height (24.9 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 Superior 6 good for 100-mile races?
Passable. 22.1 mm stack, cushion 2/5. 100-miler readiness score 41/100.
Does the Altra Superior 6 fit wide feet?
No. Toebox is 82.4 mm which is narrow. Look elsewhere if you need width.
What is the drop on the Altra Superior 6?
0.1 mm, with a 22.1 mm heel stack and 22 mm forefoot.
Is the Altra Superior 6 good on wet rock?
Lab traction has not been measured for this model yet.
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swellingRoom: 95/100 (Elite)
descentTolerance: 61/100 (Solid)
gritIngressRisk: 91/100 (Elite)
hotFootScore: 24/100 (Weak)
achillesFriendlyScore: 100/100 (Elite)
hundredMilerReadiness: 41/100 (Passable)