ShoesInov-8Trailfly Speed

Inov-8

Inov-8 Trailfly Speed

Light and low. Fast on technical ground when you trust your feet.

PR Run Verified
TechnicalSteep trailsRace dayDaily training

PR Run scores

Grip5/5
Cushion2/5
Protection2/5
Durability4/5
Versatility2/5

PR Run derived fit scores

48Passable

100-miler readiness

Will this shoe survive a hundred-mile night? 22 mm stack, cushion 2/5

42Passable

Descent tolerance

Does it save your toenails on long descents? 22 mm forefoot stack

32Weak

Swelling room

Room to grow when your feet swell? 22 mm heel stack

45Passable

Grit resistance

Does dust stay outside the shoe? Open mesh, expect grit

24Weak

Hot-day comfort

How well does it breathe in heat? Standard mesh

90Elite

Achilles-friendly

Kind to a cranky achilles? 0 mm drop

Full specs

Drop

0 mm

Heel stack

22 mm

Forefoot stack

22 mm

Weight

248 g

Lug depth

4 mm

Plate

No

Waterproof

No

Foam

Powerflow

Questions before you race

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

Passable. 22 mm stack, cushion 2/5. 100-miler readiness score 48/100.

Does the Inov-8 Trailfly Speed fit wide feet?

Toebox width has not been measured in the lab yet.

What is the drop on the Inov-8 Trailfly Speed?

0 mm, with a 22 mm heel stack and 22 mm forefoot.

Is the Inov-8 Trailfly Speed good on wet rock?

Lab traction has not been measured for this model yet.

Manufacturer specs

New lab data on technical shoes, once a month.

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Image: Inov-8 product photo

Specs: manufacturer. Verified Sep 2, 2026.

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

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