Nice Shoe
JamesM982960062
Very nice Shoe! The shoe does as it is advertised

Nike ACG Ultrafly Trail
The Ultrafly Trail takes what you love about the original and refines it, so you can go the distance. The springy ZoomX foam is more responsive and the full-length carbon plate is softer for a smooth ride. The outsole helps reduce weight while maintaining enhanced grip as the miles pile up.
4.4 Stars
Nice Shoe
JamesM982960062
Very nice Shoe! The shoe does as it is advertised
Speedy yet none forgiving
IanS122928791
Raced in the first version of the Ultrafly's and thought these would have been an improvement to them. I'll give it to Nike that these are a super snappy shoe with a great upper fit. The Vibram outsole is grippy as well -- no issues there. The main issue I'm having with them is the midsole is even stiffer than the first version! I've gotten 30 miles in the shoes so far and am hoping that it's just a break-in issue, but my feet are so sore after running in these that I cannot fathom doing any ultramarathon distance race in them, especially on technical terrain.
Poorly Designed for long distance
Jason36279447
Fascinating how a long distance trail shoe has no room for expanding with your feet. considering the R&F budget. lets say your 40 miles in to a 100 mile race. how can these adapt to your feet like most other shoes. poor design.

Nike ACG Ultrafly Trail
Engineered For
Terrain
Cushion
Shoe Weight
Heel-to-Toe Drop
Shoe Weight
287g/10.1oz (Men's US 10)
Heel-to-Toe Drop
8.5mm
Powered By
ZoomX Foam, Carbon Fiber Flyplate & Vibram® Megagrip


Caleb Olson
2025 Western States Champion