ShoesInov-8Trailfly Ultra G 300

Inov-8

Inov-8 Trailfly Ultra G 300

Graphene grip and zero drop. Built for UK-style muddy ultras.

PR Run Verified
Steep trailsTechnicalMud / wetLong ultrasRace day

PR Run scores

Grip5/5
Cushion4/5
Protection3/5
Durability4/5
Versatility3/5

PR Run derived fit scores

81Elite

100-miler readiness

Will this shoe survive a hundred-mile night? 30 mm stack, cushion 4/5

74Great

Descent tolerance

Does it save your toenails on long descents? 30 mm forefoot stack

56Solid

Swelling room

Room to grow when your feet swell? 30 mm heel stack

45Passable

Grit resistance

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

36Passable

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

30 mm

Forefoot stack

30 mm

Weight

300 g

Lug depth

4 mm

Plate

No

Waterproof

No

Foam

Powerflow+

Questions before you race

Is the Inov-8 Trailfly Ultra G 300 good for 100-mile races?

Elite. 30 mm stack, cushion 4/5. 100-miler readiness score 81/100.

Does the Inov-8 Trailfly Ultra G 300 fit wide feet?

Toebox width has not been measured in the lab yet.

What is the drop on the Inov-8 Trailfly Ultra G 300?

0 mm, with a 30 mm heel stack and 30 mm forefoot.

Is the Inov-8 Trailfly Ultra G 300 good on wet rock?

Lab traction has not been measured for this model yet.

New lab data on steep trails 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 Ultra G 300 Review, Specs, and Fit (2026) | PR Run