The Inov8 Trailfly Zero Review & Lab Test: Shop Men’S & Women’S Models of 2026

The Inov8 Trailfly Zero is a lightweight trail shoe designed for those seeking a natural running experience. Its zero-drop offset makes it ideal for runners who prefer a more grounded feel while navigating diverse terrains.

Lab measurements highlight the spacious foot-shaped toebox and a highly flexible structure, catering to those prioritizing comfort and adaptability. The nitrogen-infused Flyspeed Pro midsole offers notable impact protection, providing more support per millimeter of stack height compared to other foams, all while maintaining a competitive weight.


Pros

  • True zero-drop shoe
  • Great shock absorption for a low stack
  • Very grounded and trail-connected
  • Roomy foot-shaped fit (+ wide option)
  • Excellent grip on mixed terrain
  • Lighter than the average trail shoe
  • Extremely flexible design
  • Durable Graphene Grip outsole
  • Thick and responsive Boomerang insole

Cons

  • Lacks a secure heel hold
  • Upper could be more durable

Key Features

  • Replaces the award-winning TrailFly G270 shoe
  • Flexible rock plate for enhanced underfoot protection
  • Zero Drop design promotes a natural foot position
  • Equipped with a Boomerang premium insole for added comfort
  • Anatomical design with a wide toebox for better fit

Specifications

  • Origin: Imported
  • Sole material: Rubber
  • Outer material: Nylon
  • Closure type: Lace-Up

Inov8 Trailfly Zero Review & Lab Test: Shop Men’S & Women’S Models – Price, Ratings, Reviews & Sales Insights

Inov8 Trailfly Zero Altra Lone Peak 9 Altra Superior 6 Altra Timp 5
Price $160 $140 $130 $155
Trail terrain Light Light Light Light
Arch support Neutral Neutral Neutral Neutral
Weight lab Weight brand 9.4 oz / 266g 10.9 oz / 309g 9.6 oz / 272g 9.5 oz / 269g
Drop lab Drop brand 0.5 mm 0.0 mm 0.1 mm -0.1 mm
Strike pattern Mid/forefoot Mid/forefoot Mid/forefoot Mid/forefoot
Size - True to size Slightly small Half size small
Midsole softness Balanced Balanced Balanced Balanced
Difference in midsole softness in cold Small Normal Normal Small
Toebox durability Decent Decent Very bad Good
Heel padding durability Decent Decent Decent Decent
Outsole durability Good Good Good Good
Breathability Moderate Warm Breathable Moderate
Width / fit Medium Wide Medium Wide
Toebox width Wide Wide Wide Wide
Stiffness Flexible Moderate Stiff Stiff
Torsional rigidity Flexible Moderate Moderate Stiff
Heel counter stiffness Flexible Flexible Flexible Moderate
Lug depth 3.4 mm 3.8 mm 3.3 mm 3.0 mm
Heel stack lab Heel stack brand 24.9 mm 23.3 mm 22.1 mm 28.6 mm
Forefoot lab Forefoot brand 24.4 mm 23.3 mm 22.0 mm 28.7 mm
Widths available Normal Normal Normal Normal
Season All seasons All seasons Summer All seasons
Removable insole
Orthotic friendly
Ranking Top 44% Top 9% Bottom 12% Bottom 17%
Popularity Bottom 5% Top 12% Bottom 29% Top 38%