ShoesInov-8Trailfly

Inov-8

Inov-8 Trailfly

Inov8 Trailfly. 30.1mm stack, 282g. Retailer specs verified on Running Warehouse.

PR Run Verified
Soft trailsLong ultrasDaily training

PR Run scores

Grip3/5
Cushion4/5
Protection2/5
Durability3/5
Versatility3/5

PR Run derived fit scores

69Great

100-miler readiness

Will this shoe survive a hundred-mile night? 30.1 mm stack, cushion 4/5

48Passable

Descent tolerance

Does it save your toenails on long descents? 24.1 mm forefoot stack

56Solid

Swelling room

Room to grow when your feet swell? 30.1 mm heel stack

100Elite

Grit resistance

Does dust stay outside the shoe? 4 BR breathability

23Weak

Hot-day comfort

How well does it breathe in heat? 4 BR / ?% drying

80Elite

Achilles-friendly

Kind to a cranky achilles? 6 mm drop, heel counter 2/5

Full specs

Drop

6 mm

Heel stack

30.1 mm

Forefoot stack

24.1 mm

Weight

282 g

Lug depth

3.9 mm

Plate

No

Waterproof

No

Lab measurements

MeasurementValue
Breathability4 BR
Heel counter2/5
Outsole thickness3.2 mm
Tongue padding9.0 mm
Insole removableYes
Insole thickness6.3 mm
Reflective elementsNo

Lab numbers from RunRepeat. Sources.

Fit intelligence

Runs small. Consider a half size up.

Fit numbers from the lab. Swell guidance: foot care.

Questions before you race

Is the Inov-8 Trailfly good for 100-mile races?

Great. 30.1 mm stack, cushion 4/5. 100-miler readiness score 69/100.

Does the Inov-8 Trailfly fit wide feet?

Toebox width has not been measured in the lab yet.

What is the drop on the Inov-8 Trailfly?

6 mm, with a 30.1 mm heel stack and 24.1 mm forefoot.

Is the Inov-8 Trailfly good on wet rock?

Lab traction has not been measured for this model yet.

Manufacturer specs

New lab data on soft trails shoes, once a month.

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Image: Inov-8 product photo

Specs: manufacturer. Verified Sep 4, 2026.

Report inaccurate data: hi@pr.run. Data sources.

Inov-8 Trailfly Review, Specs, and Fit (2026) | PR Run