Nike
ACG Ultrafly 2
Nike's carbon-plated trail racer, sold as the ACG Ultrafly Trail. Full ZoomX, a split carbon plate that flexes over rough ground and Vibram Megagrip make it fast, protective and surprisingly stable for long races, though it is pricey and runs warm.
What's new: Lighter, with upgraded ZoomX, a split carbon plate that flexes more over rough ground, a wider midfoot and toe box and longer Vibram lugs than the 2023 Ultrafly.
Where to buy the ACG Ultrafly 2
RRP around £230. Tap through for today's price.
Video reviews
What it feels like
Fit
True to size
True to size with a roomier toe box than the original, though some testers found it low over the toes. Consider half a size up for long, hot races.
What the critics say
91/100 review score
- RunRepeat 88/100
- Road Trail Run 9.4/10
- Positive: Lively ZoomX with a plate that is friendlier than most carbon trail shoes
- Positive: Stable and protective for its height
- Positive: Lighter and roomier than the first Ultrafly
- Mixed: Plate still feels stiff on steep climbs
- Mixed: Shallow-ish lugs for deep mud
- Negative: Very expensive
- Negative: Warm upper that doesn't breathe well
Paraphrased from published reviews. Read them in full:
What Reddit runners say
Runners on Reddit don't hold back. Jump straight into the conversations about the ACG Ultrafly 2.
On Instagram
#nikeultraflySee how runners are wearing itThe numbers
- Type
- Trail
- Weight
- 278 g
- Heel stack
- 38 mm
- Drop
- 8.5 mm
- Plate
- Carbon plate
- Support
- Inherently stable
Weight for a men's US 9 / UK 8.5.
The short version
In short
Best for trail races and ultras if you want a fast, protective and surprisingly stable plated shoe. It's now lighter and roomier, but it's very expensive and the upper runs warm.
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NikeThe full range, rankedBest-reviewed trail shoes
The highest-scoring current trail shoes, averaged across published reviews.
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