adidas
adidas Racer Tr21
adidas Racer Tr21. 31.9mm stack, 318g. 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? 31.9 mm stack, cushion 4/5
Descent tolerance
Does it save your toenails on long descents? 19 mm forefoot stack
Swelling room
Room to grow when your feet swell? 31.9 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? 12.9 mm drop, heel counter 2/5
Full specs
Drop
12.9 mm
Heel stack
31.9 mm
Forefoot stack
19 mm
Weight
318 g
Plate
No
Waterproof
No
Lab measurements
Fit intelligence
True to size.
Fit numbers from the lab. Swell guidance: foot care.
Questions before you race
Is the adidas Racer Tr21 good for 100-mile races?
Great. 31.9 mm stack, cushion 4/5. 100-miler readiness score 69/100.
Does the adidas Racer Tr21 fit wide feet?
Toebox width has not been measured in the lab yet.
What is the drop on the adidas Racer Tr21?
12.9 mm, with a 31.9 mm heel stack and 19 mm forefoot.
Is the adidas Racer Tr21 good on wet rock?
Lab traction has not been measured for this model yet.
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swellingRoom: 62/100 (Solid)
descentTolerance: 41/100 (Passable)
gritIngressRisk: 76/100 (Great)
hotFootScore: 22/100 (Weak)
achillesFriendlyScore: 46/100 (Passable)
hundredMilerReadiness: 69/100 (Great)