Allbirds
Allbirds Tree Flyer 2
Allbirds Tree Flyer 2. 32.1mm stack, 293g. 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? 32.1 mm stack, cushion 4/5
Descent tolerance
Does it save your toenails on long descents? 24 mm forefoot, heel counter 3/5
Swelling room
Room to grow when your feet swell? 24.8 mm toebox height
Grit resistance
Does dust stay outside the shoe? 4 BR breathability
Hot-day comfort
How well does it breathe in heat? 4 BR / ?% drying
Achilles-friendly
Kind to a cranky achilles? 8.1 mm drop, heel counter 3/5
Full specs
Drop
8.1 mm
Heel stack
32.1 mm
Forefoot stack
24 mm
Weight
293 g
Plate
No
Waterproof
No
Lab measurements
Fit intelligence
Toebox width
Narrow toebox (71.6 mm vs 96 mm median)
Toebox height
Category-average height (24.8 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 Allbirds Tree Flyer 2 good for 100-mile races?
Great. 32.1 mm stack, cushion 4/5. 100-miler readiness score 78/100.
Does the Allbirds Tree Flyer 2 fit wide feet?
No. Toebox is 71.6 mm which is narrow. Look elsewhere if you need width.
What is the drop on the Allbirds Tree Flyer 2?
8.1 mm, with a 32.1 mm heel stack and 24 mm forefoot.
Is the Allbirds Tree Flyer 2 good on wet rock?
Lab traction has not been measured for this model yet.
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swellingRoom: 100/100 (Elite)
descentTolerance: 73/100 (Great)
gritIngressRisk: 77/100 (Great)
hotFootScore: 23/100 (Weak)
achillesFriendlyScore: 62/100 (Solid)
hundredMilerReadiness: 78/100 (Great)