Inov-8 TrailFly Ultra G 300 Max: long name, big deal

Inov-8 trail shoes have been associated with firmer, closer-to-the-ground, aggressive silhouettes. This time around, we get a high-stack (the highest in the brand's lineup, actually), softer, hybrid TrailFly.

The company takes a new approach to its collection of ultra running shoes, producing a well-cushioned option for hours of comfort.

What is it for?

  • Distance: unlimited
  • Pace: slow-to-moderate
  • Terrain: paved roads, hard-packed trails, rocky paths (NOT recommended for soft, muddy terrain)

What's to like about the TrailFly Ultra G 300 Max?

  • Better cushioning: Graphene-infused G-Fly foam is reported to have 25% higher energy return that lasts for dozens of miles at a time.
  • Added energy return from the insole: The Boomerang insole is claimed to be 40% more responsive than standard inserts.
  • Better outsole adaptability: A deep Adapter-Flex groove helps the heel and forefoot work independently for optimum foot movements on various terrain.
  • G-Grip: 50% more durable and stickier than regular rubber.
  • Secure lockdown: Thanks to the gusseted tongue and Adapter-Fit overlays.
  • Plenty of wiggle room: Marked 5/5 on Inov-8's Fit Scale, the shoe boasts a wide forefoot.

Inov-8 TrailFly Ultra G 300 Max vs. TerraUltra G 270

TerraUltra G 270 became a hit in 2020 and became a "trail shoe of the year" for many avid runners. Is TrailFly Ultra G 300 Max is worthy counterpart?

What’s the same?

  • G-Grip with 4 mm lugs
  • wide toebox (Fit Scale 5)
  • adapter-fit upper + gusseted tongue

What’s different?

  TrailFly G 300 TerraUltra G 270
Weight 300 g 270 g
Drop 6 mm 0 mm
Heel height 30 mm 12 mm
Cushioning softer, more impact protection, more long-distance comfort firmer, more grounded
Other benefits Adapter-Flex: 10-mm cut for underfoot maneuverability feels faster
Price $190 $160

Facts / Specs

Terrain: Trail
Weight: 338g
Drop: 6mm
Arch support: Neutral
Forefoot height: 24mm
Heel height: 30mm
Pronation: Neutral Pronation / Supination / Underpronation

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Inov-8 TrailFly Ultra G 300 Max video reviews

Jens Jakob Andersen
Jens Jakob Andersen

Jens Jakob is a fan of short distances with a 5K PR at 15:58 minutes. Based on 35 million race results, he's among the fastest 0.2% runners. Jens Jakob previously owned a running store, when he was also a competitive runner. His work is regularly featured in The New York Times, Washington Post, BBC and the likes as well as peer-reviewed journals. Finally, he has been a guest on +30 podcasts on running.