ShoesTopo AthleticUltrafly 6
Topo Athletic
Topo Athletic Ultrafly 6
Topo Ultrafly 6. 33mm 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? 33 mm stack, cushion 4/5
Descent tolerance
Does it save your toenails on long descents? 26.4 mm forefoot, heel counter 2/5
Swelling room
Room to grow when your feet swell? 30.9 mm toebox height
Grit resistance
Does dust stay outside the shoe? moderate BR breathability
Hot-day comfort
How well does it breathe in heat? Standard mesh
Achilles-friendly
Kind to a cranky achilles? 6.6 mm drop, heel counter 2/5
Full specs
Drop
6.6 mm
Heel stack
33 mm
Forefoot stack
26.4 mm
Weight
272 g
Plate
No
Waterproof
No
Lab measurements
Fit intelligence
Toebox width
Narrow toebox (80.3 mm vs 96 mm median)
Toebox height
Tall toebox (30.9 mm vs 25 mm median)
Fit intel pending.
Fit numbers from the lab. Swell guidance: foot care.
Questions before you race
Is the Topo Athletic Ultrafly 6 good for 100-mile races?
Solid. 33 mm stack, cushion 4/5. 100-miler readiness score 63/100.
Does the Topo Athletic Ultrafly 6 fit wide feet?
No. Toebox is 80.3 mm which is narrow. Look elsewhere if you need width.
What is the drop on the Topo Athletic Ultrafly 6?
6.6 mm, with a 33 mm heel stack and 26.4 mm forefoot.
Is the Topo Athletic Ultrafly 6 good on wet rock?
Traction coefficient of friction on wet lab surface: 0.56. Elite grip on wet rock.
Manufacturer specs · Retailer listing
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swellingRoom: 100/100 (Elite)
descentTolerance: 100/100 (Elite)
gritIngressRisk: 62/100 (Solid)
hotFootScore: 36/100 (Passable)
achillesFriendlyScore: 77/100 (Great)
hundredMilerReadiness: 63/100 (Solid)