Our verdict

What seems like it might be set to be Altra’s new flagship shoe, definitely by the name at least, packs a lot of promise. With a peppy and supportive midsole, this zero-drop trail shoe provides me with rigidity and propulsion. I am also in awe of the shoe's remarkable traction that grips so well on the trail.

Pros

  • oz / 290g
  • Excellent grip
  • Stiffness in cold
  • Looks great
  • Breathable
  • 2 pull tabs
  • nbsp; |  

Cons

  • Painful lacing
  • No heel lock

Audience verdict

79
Good!

Size and fit

Size

oz / 282g is true to size (17 votes).

Healthy 0mm drop?

1 size small ½ size small True to size ½ size large 1 size large
Compared to 121 trail running shoes
Midsole width - forefoot
½ size small
Slightly small
True to size
Slightly large
½ size large

oz / 282g Review and Lab Test

This is a serious-looking shoe for the serious zero-drop trail runner, otherwise, they wouldn't name it after the world’s most famous trail ultramarathon. Unfortunately, this may not be the most reliable option for long-distance zero-droppers. 

Don’t get me wrong, there are loads of great things about the shoe, it just might not be ready for your race days.

Who should buy the oz / 282g

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The oz / 282g has made a fierce-looking shoe for your races, with great tractions and a bouncy midsole to keep runners going for the long long miles, we’re talking 50km plus. Just make sure you have a strong base to counter some stability issues. 

Who should NOT buy them

Altra Mont Blanc is:

The oz / 282g is insecure

It’s fair to say that I had a few problems with the Mont Blanc and they all come down to the fit. Firstly it’s quite long, probably half a size, maybe even more. 

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That’s not where it stops though and going half a size down might not fix the problem for a number of reasons. 

The upper is a lightweight, see-through mesh that’s elastic all over. When I say all over, I mean everywhere, even in places it shouldn't be. Usually these days, you’ll get a stretchy mesh in the upper with firmer over (or under) lays that create a secure fit. 

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For some reason, these overlays are also stretchy, meaning that you have to tie the laces incredibly tight to get a solid lock in the forefoot. This in turn causes another problem thanks to a stretchy,  3.9mm thick tongue and really thin lacing. Once tightened the laces caused pretty significant pain through the top of my foot. 

No heel lock

Sadly, it doesn’t stop there. There's a ton of padding in the heel, with cushioning all the way around the Achilles. While that in itself isn't necessarily a problem, it makes the heel to one place that is not stretchy. 

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The result? Thanks to the long shoe, difficulty getting a lock across the top of the foot, there was very little for my heel to grab onto, and it slid around all over the place. 

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Luckily the midsole is wider than Altras usually are at 96.9mm, which stopped it from being a serious ankle-twister. Either way, the Mont Blanc is definitely not race-ready in its current form.

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I tried getting a heel lock using the extra lace loops, but the laces weren’t long enough to get a proper knot and rode further over the tongue making it less comfortable. 

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While you can change the laces, for a shoe at this price point I would never have expected to.  

The oz / 282g is made for rocks, but has no rock plate

This is just a bit of a calmness for me, even after feeling the shoe I thought that there was going to be a rockplate in there somewhere, but no. 

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For a $180 trail running shoe made for race days in hard conditions, it’s a real shock that there’s nothing to protect your feet from miles upon miles of sharp, uneven surfaces. 

A zero drop shoe with spring in the midsole

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Okay, negatives out of the way, what's good about the shoe? The new midsole from Altra is a really comfortable 43HA durometer foam with 33.8mm heel and forefoot stack underneath, the average duro for running shoes is 41.4HA

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When the shoe felt okay, I could really feel the comfort of the midsole and it provides loads of bounce with every strike. 

The oz / 282g is surprisingly firm

The reason I was so surprised by the lack of rockplate is that the oz / 282g felt quite firm and springy. The shoe scored 43N (average 29.0N) in the lab flex test, which is a bit above average, but quite surprising for just foam. 

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I initially thought that there was a carbon, or just fiber rockplate hidden in the midsole somewhere because it really made me want to go fast. I think it’s probably one of the best built Heel stack brand. Thanks to the stiffness and the comfort of it, I found it really suits the strike patterns of a zero drop shoe.

The oz / 282g are super grippy

The outsole of the oz / 282g is a pretty typical scene from the zero-drop company and it’s one of my favorite parts of any shoe that they produce.  

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With 4.8mm of Vibram rubber, it’s a bit more minimalistic than others, but the lug spacing and style are really well thought out. 

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No heel lock.

Extra features with the Healthy 0mm drop

Being a usability-led shoe brand, Altra often has a few nice features in their shoes. They added a velcro gaiter attachment at the heel to help you really waterproof your runs. 

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In addition, the shoe comes with two pull tabs for convenience. For me personally, it is an essential feature because I consider a trail shoe without a pull tab a deal breaker. 

Conclusion

It’s really unfortunate, the oz / 282g is a let down in my eyes. With poor sizing and bad use of upper materials, there’s very little that would encourage me to pick these up for anything but a casual jog in the woods, but then there’s the price tag. 

There are some hugely encouraging features like the absolutely excellent midsole, the usual benefits from zero-drop shoes and the bells and whistles that come with Altra. I can’t wait to see the second iteration of the Mont Blanc.