Mizuno Neo Accera Review: Tumbled Off The Trail

Introduction to the Mizuno Neo Accera

REESE: I haven’t run in a Mizuno shoe since my freshman year of college, circa 2006. The Mizuno Wave Rider was my go-to shoe for everything. Now, I had no idea that the shoe I wore for cross country and track practice wasn’t the best choice for the JFK 50-mile, but that didn’t stop me from wearing it for the race.

I think that poor shoe choice made me open my eyes to other shoes. I’m honestly surprised that the salesperson at Dick’s or Sports Authority didn’t sell my mom and me on a pair of Brooks Ghosts or Nike Shox. Looking back, Mizuno feels like an odd choice for a high schooler’s first real pair of running shoes. This is all to say, I haven’t worn a Mizuno in a while, so I was excited and, based on the colorway, a little nervous to run in this shoe.

I know the adage is to not judge a book by its cover, but jeez. Sometimes, you’ve got to heed Maya Angelou’s advice that if someone tells you who they are, believe them the first time. Let’s just use a pretty banal example to illustrate what I’m talking about.

It’s like scrolling through a dating app and finding a person who has a “the mountains are calling” quote in their bio, but all their photos are of them double-fisting tequila shots in a basement bar. Sure, they say the mountains are calling, but the evidence seems to suggest they’ve only answered the beckoning call of “Shots! Shots! Shots!” And then a thought crosses your mind that even if they aren’t outdoorsy, you can change them, or at the very least, you can learn to love them. Oh, honey.

To that end, this shoe’s colorway is loud and a bit all over the place; it screams, “I’m a wildcard.” But the specs make me think this is going to be such a stable, practical, sensible shoe. Oh, honey.

TAYLOR: Fun fact: the first shoe I ever reviewed for Believe in the Run was from Mizuno. Being that I was a trail reviewer, I should have been suspicious. I’m convinced the trickle-down effect bestowed that particular shoe on me… as in, nobody really wanted to review it because of Mizuno’s resume of the time.

I’ll give credit where it’s due; Mizuno has more than turned its ship around. They’ve completely reinvented it! They have plenty of stellar road offerings and should be recognized for their reinvestment in innovation. This is exactly why the new Mizuno Neo Accera brought all of us trail folk so much stoke. We want a piece of the pie, too.

The Neo Accera follows the footsteps of Mizuno’s recently popularized Neo line with updated foams, unique rockered geometry, and a lightweight build. Based on specs alone, it most closely resembles the Neo Zen on the road. We’re looking at 41/33 mm stack (8 mm drop) of Enerzy NXT foam, a lightweight mesh upper, and a fan-favorite Vibram Megagrip outsole with 4 mm Traction Lugs.

Based on the description alone, the Mizuno Neo Accera sounds like a winner! While ingredients can say a lot about a shoe, it rarely tells the whole story.

SAM: To round out our series of firsts here, the Mizuno Neo Accera is honest-to-goodness the first Mizuno I’ve ever run in. I started running when Mizuno was in its doldrums, and by the time it was releasing bangers (or so I’ve heard) like the Neo Zen, I had started contributing here at Believe in the Run. My review queue saves me from having to invest money in new shoes, but it can sometimes keep me from lacing up what’s new and hot, especially for road running. It’s a trade-off I’m frankly thrilled to make.

That wasn’t meant as a humble brag, but instead as a way to say that I was just as excited as Reese and Taylor were to get to try out this new Mizuno trail shoe we’d been hearing rumors about. Plus, it comes in that Mizuno “disguised concept car” colorway they’ve been using to release new models they’re excited about. I, like any other reasonable human who has spent too many hours watching Top Gear, love to see my feet outfitted like a BMW during testing. Time to see if what’s under the hood of this new concept has what it takes.

What we like about the Mizuno Neo Accera

REESE: I have mixed feelings on the Mizuno Neo Accera; some aspects are quite nice, while other design and material choices give me pause. But let’s dive right in.

The Wave Rider’s wave technology has nothing on the midsole of the Mizuno Neo Accera. It’s the real star, the keystone, of this shoe. With a stack height of 33 mm /41 mm, the midsole has some serious volume — almost as voluminous as the colorway. It’s a dual-density midsole with a solid EVA rockplate sandwiched under the forefoot. The top layer is Mizuno’s Energy Nxt, a nitrogen-infused foam.

Under the rockplate, we have what Mizuno calls Smooth Speed Assist, which refers to the shoe’s geometry — albeit a less extreme version than the Hyperwarp series shows off. This layer intends to reduce ankle joint load and calf strain. I’m not sure if I can pinpoint that effect, but I can confirm that his midsole has got plenty of cushion for the pushin’.

On the one hand, it’s responsive; on the other, it’s really plush. It has pop and zing, but it’s also like a memory foam pillow. In theory, I can see this foam being perfect for long haul distances, I’m thinking 100 miles and up. But it’s springy and fast enough to be fun at a 50k. In practice? Well, I’ll leave that for the next section.

The outsole is sweet, sweet Vibram Megagrip. On the flat, this worked well for me, performing as I would expect a Vibram outsole to perform. On the flats and descents, the outsole was mostly great; however, it wasn’t great 100% of the time.

As with other areas of the shoe, the upper has its ups and downs. The positive is that it’s lightweight and minimal. It feels more like a road shoe upper. And the Neo Accera sports my favorite kind of laces: braided speed laces.

TAYLOR: Without even peeking at the rest of the team’s opinions, I know that the midsole is going to be the standout feature of the Mizuno Neo Accera. I can definitely tell why the road-squad has loved what’s going on in the Neo line. This stuff is sweet. It’s a nitro-infused EVA midsole that is squishy, bouncy, and lovely underfoot. Since there’s such a high stack of the Enerzy NXT foam, all of that gets enhanced. It’s in the ranks of the cushy goodness of the Hoka Mafate 5, Salomon Aero Glide 4 GRVL, or the New Balance Hierro v9.

A subtle rocker, called Smooth Speed Assist, complements the foam for a very smooth ride on lighter terrain… imagine that! I was a little worried that the rocker would be too extreme, but it transitioned well through the gait. That is partly due to the forefoot rock plate as well. It is sandwiched between layers of foam and serves as both a protector and a stability mechanism. Sometimes a hyper-squishy foam like this can ooze wherever it wants to if there’s nothing embedded (plate, firmer foam, etc). That’s not the case with the Neo Accera, thankfully.

I don’t always comment on a shoe’s arch support; however, the Neo Accera’s was a positive. The support felt natural, aka not too invasive. The Topo Athletic MTN Racer 4 was similar in this sense.

As always, Vibram Megagrip Litebase showed up and performed. Mizuno used a really unique lug design that worked well on multiple surfaces and conditions. There are larger, flatter lugs (like an approach or mountaineering shoe) that stick to the trail and rocks quite well. It also performed extremely well across pavement and other hard-packed surfaces. Aside from deeper, muddier sections, I had zero issues with this outsole.

While you won’t see much of the upper in this section, I do have to say it felt light and breathable, and they used the braided lace we all love. To be continued in the next chapter…

SAM: Midsole! Midsole! This foam feels seriously great underfoot, and I’m just joining the chorus started by Reese and Taylor. The Enerzy NXT is so soft underfoot (pillowy is a fairly good descriptor for how the heel of this shoe feels), and yet it maintains a subtle responsiveness that keeps the ride lively and fun.

It shares a lot, as far as the feeling on the run, with New Balance’s Fresh Foam X, but Enerzy NXT feels just a touch more exciting to me. On the Neo Accera, we’re treated to quite a bit of this great foam, but the 8 mm drop means a bit less in the forefoot. That drop does, however, consistently push you forward onto your toes, and the subtle rocker keeps your stride even and flowy on flat ground. This shoe always felt fast to me, despite the listed weight and the chunky Vibram outsole.

The upper is breathable, and I’m going to disagree with Reese here and say that I’m not totally against the look. As I said above, it has me thinking concept car, which probably has something to do with how fast I thought I was running. I also appreciated the tongue construction. It’s got a tighter gusset and just the right amount of padding to avoid lace bite without feeling bulky.

What we don’t like about the Mizuno Neo Accera

REESE: The shoe tried to tell me who it really was, confusing and a bit of a wild card. It seems like in this review, the reviewers are all aligned in our “wait, huh?” moments.

There are a few times I can recall not trusting Vibram Megagrip, but this is one of them. I’m not sure if it’s because of the shape of the shoe, the push-off point is weird, or the lug placement or pattern is off, but for some reason, I found myself only using the most forward part of the toe for grip on an incline. And there just wasn’t traction to be found. Even on the flats, if I picked up the pace, it felt like the shoe lost traction on the push-off, which is bizarre because most of the outsole is covered in Vibram rubber, with just a small section of foam exposed.

Despite loving the feel of the midsole, the stability is lacking or, at the very least, questionable. I suppose I shouldn’t blame the midsole entirely; it’s a combination of the high stack foam, fit, and upper. Luckily, by my third run, I had accepted the shoe’s personality and taped up my ankle. Good call, as running up a fire road, the shoe snapped to the side a few times.

This Mizuno Neo Accera has a big drop, 8 mm. I don’t know who told shoe designers that trail runners are dying for more high-drop shoes, but this is the fifth shoe I’ve tested this year that has a drop of 8 mm or more. (The first four being the Nike ACG Ultrafly, the Adidas Agravic Speed Ultra 2, the Adidas Agravic Speed 2, and the Adidas Agravic TT.) It’s doable but tough to make a high-drop shoe feel super stable on technical terrain.

Given the specs of this shoe, it feels like it was built for the long haul, big races where you’ll encounter just about every terrain. Given that a lumpy, poorly paved fire road gave me issues, I found myself being hyper-cautious on any technical trail.

The shape of the shoe plays a bit role in the stability factor. For many high-stack shoes, the base is wide throughout, or the heel and ball of the foot are wider for stability. The Mizuno Neo Accera feels pretty pointy, with the toe easy to roll from side to side.

It’s not just the silhouette that’s narrow; the shoe’s volume seems to vanish as you move toward the front. This creates a cramped sensation at the very tip, where the toe protector aggressively slims down the toe box. In fact, the plastic bumper actually sits lower than the toe itself, creating an awkward fit where the foot feels like it’s fighting for space.

In addition to the shoe’s shape causing some instability, the upper is just really disappointing. It’s a shapeless amoeba. It feels like so much thought went into the midsole, and then a cheap towel was slapped on the top of the shoe. It has no structure. I experienced wrinkling in the fabric around the arch. I’ve worn plenty of shoes that have lightweight uppers that are clearly high quality, but this one literally feels cheap. Which is crazy considering the shoe is $200.

The overall fit is a bit off. As I said, its narrows at the toe box, the volume of the tip of the shoe is low, and the heel cup felt not quite right as well. It was like the heel needed to be a little deeper or the back of the shoe needed to come up a little higher.

TAYLOR: Unbalanced might be the best word to describe the Mizuno Neo Accera. Perhaps this is where Sam can pull us into something wildly introspective about ourselves and why this shoe ended up the way it did.

What baffles me most is this upper. Is it inspired by a potato sack? For starters, there’s way too much volume. My foot is fairly average, even borderline wide, and I still had to lace the Neo Accera to the max to get any sort of lockdown. At that point, I was creating weird pressure points in the stumpy toebox and at the ankles collar.

While I commented that the positives are light and breathable, there are significant downsides to the upper’s material choice. It lacks the structure necessary to stay on top of the footbed for any sort of control on moderate to technical terrain. And because this midsole is high and soft, it’s really a recipe for disaster if you trust it too much… trust me.

Like my fellow reviewers, I also had an interesting experience with the outsole during toe-off. I only felt it on steep uphill terrain, soft conditions, and at a faster clip. I won’t attribute it to the tacky rubber itself. There’s simply something off about the most forward lug design… and…oddly enough, it might seem to be the broader flat lugs so far forward in the toe that lack digging power.

SAM: Unfortunately, I’m also stumped by the upper on the Mizuno Neo Accera, to the point where I’m drawing a blank on anything introspective. While I may be a bit more behind the design of this shoe, I found myself struggling with the mesh on which the design is printed. It is baggy and lacks rigidity to provide a solid lockdown.

There is a brief underlay at midfoot for support, and it helped some, but it doesn’t have the presence or the gumption to take in all the extra material. To get anything that resembled security, I had to tie the laces tight enough that the fabric over the toebox bunched up. This left the shoe feeling like a road shoe with a particularly bad upper fit.

There is an EVA rockplate sandwiched in the midsole foam here, and it, like the upper, has me at a loss. It’s firm enough that I start to feel it under the ball of my foot on longer efforts, but soft enough that I can still feel basically every rock underfoot (and one particularly painful gumball from a Sweetgum Tree). This leaves me to ask: why? Why not a firmer rockplate between the outsole and midsole foam that would actually protect my feet, where the beautifully soft foam cannot? Or, why not no rockplate so the foam can really shine?

Lastly, there’s the softness on toe-off. Usually, we love to see “soft” as a shoe descriptor, but not when it comes to grip with a Vibram outsole. As Taylor said, the broad lugs on the Vibram soleplate here make this a pretty decent road-to-light-trail option, but man, is it wild to feel your grip disappear as you push through your toes on soft ground or on uphills.

Final thoughts on the Mizuno Neo Accera

REESE: I should have judged a shoe by its color way. This shoe is a bit disjointed in practice. Like a lot of shoes I’ve tested this year, the recipe’s ingredients should make something I’d love, but in practice, it just doesn’t come together. Mizuno is on the right track with the midsole.

I’m hopeful that Mizuno rides this…wave… of good ideas and technology in the trail space, and they can put together a bit more of a stable, well-rounded shoe, but this one is just a little too wild and unpredictable for me.

TAYLOR: If we were judging this shoe solely on the ride, we’d have a banger here!

But we’re not. So, what do we have? Well, the Mizuno Neo Accera could certainly be a great road-to-trail/gravel shoe. Anything more technical brought trepidation due to the fit (the most important trait of a trail shoe IMO).

It should be more than that, though. At $200, this is a hard sell just because of the terrain and conditions I felt comfortable running on in this shoe.

On the flip side, if you love your Mizuno Neo line and need a versatile option to bridge pavement and dirt, the Mizuno Neo Accera should be right up your alley.

SAM: I know Taylor expected some form of careful introspection for me, inspired by the discrepancies in the Mizuno Neo Accera. I really wish I could have delivered, but instead I’m left with a half shrug and a wry smile. This shoe has a frankly beautiful underfoot ride that’s marred by a puzzle of an upper and a Vibram outsole about which we actually had something negative to note for once. If this shoe were $140, I’d tell you it’s a pretty worthwhile catch for some casual road-to-trail adventures, but it’s $200 and, well, that’s where the half shrug comes in.

I think the underfoot feel definitely gives this a place for Mizuno Neo fans (with maybe some disposable income to burn), especially those who throw little dirt stretches into their regular routes. Or, you know, if you really want your feet to feel like a concept car. Treat yourself, right?

You can pick up the Mizuno Neo Accera for $200 from Mizuno by using the buttons below.