Altra
Altra Rivera 4
Altra Rivera 4. 28.4mm 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? 28.4 mm stack, cushion 3/5
Descent tolerance
Does it save your toenails on long descents? 28 mm forefoot stack
Swelling room
Room to grow when your feet swell? 28.4 mm heel stack
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? 0.4 mm drop, heel counter 2/5
Full specs
Drop
0.4 mm
Heel stack
28.4 mm
Forefoot stack
28 mm
Weight
235 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 Altra Rivera 4 good for 100-mile races?
Solid. 28.4 mm stack, cushion 3/5. 100-miler readiness score 53/100.
Does the Altra Rivera 4 fit wide feet?
Toebox width has not been measured in the lab yet.
What is the drop on the Altra Rivera 4?
0.4 mm, with a 28.4 mm heel stack and 28 mm forefoot.
Is the Altra Rivera 4 good on wet rock?
Lab traction has not been measured for this model yet.
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swellingRoom: 51/100 (Solid)
descentTolerance: 60/100 (Solid)
gritIngressRisk: 100/100 (Elite)
hotFootScore: 22/100 (Weak)
achillesFriendlyScore: 100/100 (Elite)
hundredMilerReadiness: 53/100 (Solid)