Mizuno have had a strange year. On the road, the Neo line has quietly become one of the best things happening in running, the kind of shoe people who don’t usually get excited about foam get excited about. On the trails though? Mizuno have basically been absent. So when the Neo Accera turned up promising all of that road magic in a trail shoe, I wanted to believe it. A “super trail shoe” for ultras, road-to-trail days, the lot.
Then I did something stupid, which is often how my shoe reviews start. Marathon number 51 took me to Menorca for the Camí de Cavalls trail marathon, just six days after running London. New stupidity PB unlocked. Twenty-six-point-two miles (plus a bonus two, because trail marathons never quite are) of rocky descents, coastal single track and enough gates to make you question every life choice that led you here. And the whole way round, the Neo Accera was on my feet.
Full disclosure: Mizuno sent me these to test. Which, after 28 miles of proper Menorcan rock, they may now be regretting slightly.
Start Line Stats
Price: $200 / £165
Stack height: 41 mm / 33 mm
Drop: 8 mm
Weight: 286 g (Men’s US 9)
Lug depth: 4 mm
The Upper & Fit
I went in expecting this to be narrow. It isn’t. True to size with a surprising amount of room, and the sawtooth laces let you dial in lockdown properly, which matters more than usual on a shoe with this much stack underneath you. It’s light, breathable, and feels much closer to a road upper than anything you’d normally trust on technical terrain.
Where it let me down was the toe box. There’s less protection up front than I’d want on a trail shoe, and I noticed it the hard way, kicking rock after rock across the island’s more technical sections. If you’re the kind of runner who runs at the trail rather than around it, you’ll feel it too.
The Midsole and Cushioning
This is where the Neo Accera earns the “super shoe” tag. Mizuno’s nitrogen-infused Enerzy NXT is genuinely one of my favourite foams going, and as a bigger runner that matters. Nitrogen-infused foams tend to give you more pop and responsiveness where other foams just get squishier the harder you lean on them. Sandwiched around a rock plate and Mizuno’s Smooth Speed Assist rocker, it rolls you through your stride nicely on anything remotely smooth.
The problem is Menorca isn’t smooth. By about eleven miles in, my first-impression worry was confirmed: 41 mm of stack height is a lot to be trusting on loose, technical descents, and I felt it. Genuinely felt it, as in went over on my ankle more than once. If Mizuno shaved 10 mm off that stack, trading some cushioning for stability, I think they’d have something close to unbeatable. As it stands, this is a shoe that wants long, rolling miles, not a rock-strewn coastal path with a grudge against your ankles.
The Outer
Vibram Megagrip, 4 mm lugs, and on dry Menorcan rock it was excellent, genuinely close to 10 out of 10 underfoot. The grip was never the issue out there. What went wrong was the platform above it: high stack plus a narrower shape meant that even with great rubber doing its job, the shoe still felt unsteady the moment the trail got properly technical.
Worth flagging too, since I only tested this in the dry: other reviewers have found the same outsole loses bite on wet rock, mud and steep push-offs, in a way that doesn’t match how planted it feels on hard-packed and dry terrain.
Comparison
This isn’t a Speedgoat 7 or an Agravic SL rival, and I don’t think Mizuno particularly wants it to be. It sits closer to the max-cushion, long-haul crowd, the Hoka Mafate 5, the Salomon Aero Glide 4 GRVL, the New Balance Hierro v9, shoes built to keep your legs fresh over huge, mostly-forgiving distances rather than dance over technical singletrack. Against that crowd the foam holds its own, arguably beats most of them. It’s the stability and lockdown where it falls a rung behind.
The Final Mile
Mid-race, legs cooked and ankles unimpressed, I gave the Neo Accera 6.5 out of 10, maybe a seven on kinder terrain. Sat here writing this with fresher legs, I’ll stand by that. This is genuinely one of the best midsoles I’ve run on this year, wrapped around a shoe that picked the wrong reviewer’s wrong race for its debut.
Get it on gravel, fire roads, road-to-trail days, or a smooth 100K where the miles matter more than the technicality, and I think you’ll love it. Take it somewhere like Menorca’s coast path and you might end up, like me, on your backside wondering why the grippiest shoe you’ve worn all year still couldn’t keep you upright.
Mizuno, if you’re reading this: build the little brother with 10 mm less stack, and I will buy it the second it lands. No free pair required.
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