Nike

ACG Ultrafly 2

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Overall

#82 in

Trail Running Shoes

according to Reddit Icon Reddit

Sentiment score76% positive
16
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4

Top Pros

Top Cons

Last updated: Aug 28, 2026

Reddit Reviews

Reddit IconAshamed_Ganache_7864
5 months ago

Go for it. I think a super shoe for that race profile would be ideal, though with some technical stuff, you just need to be mindful. There are a number of good options, but find the one that works best for you. I hated the Tecton 3s, but some people love them. The first Adidas Terrex Speed Ultra did not work for me also. I used a prototype of the Ultrafly 2 and it worked out great for a non technical trail 50 miler. I would also would consider the Brooks Cascadia Elite. It's pricy though. The Prodigio Pros are a great non-plated shoe

5 months ago

Of course. Happy to help.  I got hooked up as a tester for the shoe way back. The 2 is a better shoe. The 1 was flat. I just picked up the Cascadia Elite but haven’t tried it yet. I think that could be a good shoe to try for you over the adidas.  Feedback so far from others is good. Try the prodigo pro too. It’s a great shoe. I also run in the Zegama, which is very cushioned. It’s a little over engineered and heavy, but I think it works well.  Honestly, pick one, go full send, and don’t overthink it. You can have a back up shoe to quiet the mind, but I don’t think you’ll need it. 

Reddit Icon7sport
6 months ago

Big fan of Ultraflys for dirt and gravel roads. But out of around 1500 miles I’ve run in them there’s probably only about 10 actual trail miles. The new ACG ones feel firmer and maybe a bit more capable on real trails.

12 months ago

I really don’t think the ultrafly is a “super shoe”. I think the plate just helps stabilize the foam. I use it almost exclusively on easy runs on gravel and dirt roads up and down a mountain. I generally run in almost minimalist shoes on very technical steep terrain. Then I switch to ultraflys for off days and they’re a dream. Super cushioned but not spongy. Perfect for gravel and conditions the OP is asking about. At full retail they’re stupid expensive, but I’ve got my last 2 (of 3 total) pairs for around $100

6 months ago

I use Nike Ultrafly on that terrain. Absorbs it nicely, but they’re not light

6 months ago

Big fan of Ultraflys for dirt and gravel roads. But out of around 1500 miles I’ve run in them there’s probably only about 10 actual trail miles. The new ACG ones feel firmer and maybe a bit more capable on real trails.

Reddit Icondaneccleston86
7 months ago

Nike trails are awesome ! The new ACG ones look great ! I always had Pegasus trail

Reddit Icona_b1rd
6 months ago

I know lots of people that run in Nikes, myself included. I’m seeing them more and more at races, too. The Zegama 2 and ACG Ultrafly are pretty solid shoes.

Reddit Iconamazhion
10 months ago

I avoid asphalt as much as I can and I don’t think I shuffle too much. I’ve put a decent amount of miles into my Zegama 2s, north face vectivs, Salomon’s, and ultrafly before retiring them and they held up pretty well. This is the first pair of trail shoes that looks like they took a beating early on. It is a great shoe though

Reddit Iconbekmoto
9 months ago

Great question. Road Running Adidas Evo Sl - White (344mi) Black (202mi) - fanstastic daily shoe that totally match the hype, bouncy without feeling squishy. Having two on rotation lets the foam recover. Best travel shoe to handle any type of run. Smitten. I ran over 500 miles last year in the Puma Mag Max, the SL is like that level of comfort without the weight. Nike Vaporfly 4- Blue (16mi) newest shoe for fast days. Feel great, so light and nimble. I replace my Puma Nitro 3 (322 mi) with these. Really like the lacing and upper. So excited to see what I can do in these. Trail Rotation Nike Ultrafly (85mile). These shoes don’t get much talk. But I love the plated trail shoe, these 85 miles have been hard miles. We have lots of rocks in Colorado and these glide over them and don’t squish. Only down side is they get and stay very dirty. I’ve ran everything from Moab to Jungle with these. Lots of summer hiking in them too. Bonus points is these are the best mountain bike shoes I have ever owned. Nike Pegasus Gore Tex - (250mi). My winter snow workhorses. Not to sweaty, durable as hell. Excellent grip. We are lucky to have such great shoes available.

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