Our verdict
The TrailFly G300 Max is the first max-cushioned trail shoe from Inov-8 that is considered a massive step forward for the brand. It soaks up all the advanced technologies to bring comfort for the long haul (think 100 milers). The shoe lives up to the hype and performs admirably for its higher price point.
Pros
- Abundant cushioning
- Underfoot protection
- Sticky grip
- Road-to-trail versatility
- Stable platform
- Comfortable upper
- Nice and wide toebox
- Lockdown fit
- Innovative midfoot flex
- Amply breathable
Cons
- On the heavier side
- Not a fast shoe
Who should buy the Inov-8 TrailFly Ultra G 300 Max
The Inov-8 TrailFly Ultra G 300 Max is a neutral trail running shoe best suited for:
- long distance, marathon, ultra trail running
- slow-to-moderate paced running sessions or races
- paved roads, hard-packed trails, rocky paths (but NOT recommended for soft, muddy terrain)
Feels easy on the feet
The Inov-8 TrailFly G300 Max impresses runners with its soft, “fat tire”-like G-Fly foam. It’s not as soft as in the Hoka Speedgoat but feels easy on the feet after hours of running.
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 TrailFly Ultra G 300 Max offers a well-cushioned platform
This shoe is one of the most anticipated ultra running shoes, and it is a well-cushioned option for hours of comfort.
When it comes to underfoot protection, there is no need for a rock plate as the foam “swallows stones and pebbles.”
Not a fast shoe
Several reviewers were disappointed that the declared 300 grams correspond to the US men’s size 8. The next size up is 1.3 oz (38 g) heavier.
More than a few runners expressed that the cushion holds you back from speeding up, feeling “cumbersome and clumsy.”
What's more to like about the TrailFly Ultra G 300 Max?
- Better cushioning: Graphene-infused G-Fly foam is reported to have a 25% higher energy return that lasts for dozens of miles at a time.
- Added energy return from the insole: The Boomerang insole is 40% more responsive than standard inserts.
- Better outsole adaptability: A deep Adapter-Flex groove helps the heel and forefoot work independently and deliver 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 |
