New Balance Summit Unknown

93 / 100 based on 5 expert reviews

• Mark Highland

  Level 1 expert

  Verified

  90 / 100 | RunRepeat Mark Highland

  New Balance Summit Unknown: Unwrap your feet and get closer to nature

  Trail running is where my heart really lies. Those ephemeral moments that last so briefly that you wish you had someone to experience that fleeting moment with you.

  I ended up with the New Balance Summit Unknown after some great customer service from New Balance. I was set on using a pair of the Hierro V3 fresh Foam for my races last year but had a bit of a nightmare with them.

   

  

   

  I think I may have had a defective pair, or they just didn’t work with my forefoot strike. But I ended up with the sole of my foot bruised and then to add to the issues the sole of the right shoe started coming away from the upper.

  Cue the customer service team at New Balance, and after an exchange of emails and images, I was refunded for the shoe, and I ordered the Summit Unknown as a replacement.

  Initial impression

  Out of the box, the bright orange trainers meant that I wasn’t going to be missed on the trails. Eye-catching and the reinforced toe box is reassuring you that those rogue snags won’t be catching your precious toes easily.

  Upper

  The upper material is lightweight but is not waterproof. This does drain and dry quickly. So, your feet don’t feel like they are swamped when you step in that inevitable puddle.

  As many people have mentioned the tongue of these is quite short. But unlike many, I have not experienced any slippage or stones in the shoes. The collar of the shoe is lightly padded and with this shoe being aimed at faster/race runs its intention is evident.

   

  Midsole

  I have run about 120 miles in these shoes on a mixture of trail types along the South Downs Way and the transitions between surfaces have been smooth, even though the shoe is a trail shoe using it along the road to get to or between the trails is comfortable.

  This probably comes down to the Revlite midsole of the shoe, which although not of the maximal design provides good cushioning and protection for the feet. This in part is helped by the footplate in the forefoot to help nullify the hazard of stones impacting the sole of the shoe.

   

   

  The amount of cushioning in the midsole does lead the shoe to feel responsive, and your feet feel in touch with the trail.

  Outsole

  The grip on the outsole of the Summit Unknown is provided by 5mm lugs that perform well on the shales and gravel of the South Downs Way. Whilst easily being able to cope with softer sections of the trail when required.

  I have found limits to the shoe grip at the more extreme end of the mud spectrum. But there are other shoes out there that excel at that which I would use if I needed to. Over wet rocks, the grip is exceptional and gives you the confidence to push hard without fear of slipping.

   

  Conclusion

  This shoe suits me as a forefoot runner, with a need for the shoe to flex in the forefoot. I was surprised at how flexible this shoe was even though it has the incorporated footplate.

  Over shale, gravel, and mud, the grip will not let you down and wearing the shoe on the road to the trails is painless due to the flexibility of the shoe. The only limitation of the shoes I have found has been in the extreme mud and at 175lbs.

  I would have doubts on how my feet would cope with any ultra-distance events in these. I think though that is my limitation rather than the shoes, as I have worn them on the trails for 22 miles without any issues.

  At the moment, these are my go-to trail shoes, and I don’t have any doubt that they will get used until they are gardening shoes. The Summit Unknown will appeal to those looking for a lighter/faster shoe for the trails.

  Many will be drawn to the maximal shoes of the moment, but to me, they wrap your feet in a bubble and shut you off from the trail experience. Unwrap your feet and get closer to nature with these Summit Unknown. You might like it.

  This expert has been verified by RunRepeat. Reviews are neutral, unbiased and based on extensive testing.
• Tim Wright

  Level 1 expert

  Verified

  82 / 100 | RunRepeat Tim Wright

  Desperately seeking a New Balance Leadville replacement

  Alas, the New Balance Leadville v3 ceased production, and the quest continues for a worthy replacement.

  As a middle-aged, highly competitive, trail runner with a history of calf strain problems my criteria are:

  • A decent drop (preferably 8mm+)
  • Adequate cushioning for 60km+ runs
  • A trail shoe with sufficient traction and protection for a variety of terrains
  • A lighter weight shoe (preferably <300g) for performance

   

  

   

  The New Balance Summit Unknown has been touted as a natural successor to the Leadville, being a high-end trail show from the same manufacturer.

  But how does it measure up in practice?

  My Testing

  This review is based on at least a dozen runs totalling over 200km on hilly, sometimes muddy and sometimes rocky terrain. I have not tested the shoes on runs for more than two hours.

  My experience with shoes lacking midsole cushioning is the basis of my decision for the maximum run duration.

  However, it is still important to note that the lack of cushioning contributes to the light weight of the shoes.

  Comfort, Midsole and Insole

  Arguably the most important aspect of any shoe, I consider the Summit Unknown’s comfort fairly average. On the plus side, they were not uncomfortable out of the box.

  Also, the fit is reasonable for my medium to slightly wide feet. Some reviewers have noted issue with the tongue dropping/scrunching up.

   

   

  I have not experienced this although the neoprene-style tongue is one of the least comfortable tongues I have encountered in trail shoes.

  Overall, the shoe has a slightly rigid, plastic feel. Additionally, the uppers are not particularly soft or comfortable.

  The Summit Unknown boasts a highly desirable 10mm drop. This drop is crucial for a runner susceptible to calf tears and calf strain. The drop reduces the pressure on the calves.

  However, I don’t find these shoes particularly comfortable. It's because of the overall modest heel and forefoot height combined with a relatively hard, unforgiving midsole.

  In this regard, I would not use them for runs over two hours as the cushioning is insufficient for this purpose.

  I have not experienced any movement of the insole in wet conditions. The shoes are performing well in this aspect.

  Weight

  This criterion is a huge plus for the Summit Unknown. The shoes weigh 245g. This is well under the weight of the Leadvilles (293g) and the majority of trail running shoes.

  Durability

  The mighty Leadvilles boasted a Vibram outsole that was hard-wearing and the uppers lasted for a long time. It is a little early to tell if the Summit Uknown will go the distance.

  Nevertheless, the outsole does not appear to show noticeable wear after 200km on the trails. However, there are some tell-tale signs of fabric abrasion occurring on the uppers.

   

   

  These abrasions can be found at a logical location, around the flex-point on the big-toe side of both shoes.

  Outsole

  Another huge plus for the Summit Uknown is the good amount of traction from the lugged outsole. This is one area in which the Leadville had a chink in the armour. 

   

   

  The Leadville did not grip well in muddy and wet conditions. The Summit Unknown perform very well in this regard

  Nimbleness

  The very light weight of these shoes and modest stack height might be expected to yield a highly nimble shoe.

  However, my experience is a little disappointing in this regard. It might be due to the hard midsole and plastic-like uppers.

  Wearing it feels a little like wearing clogs, albeit light and grippy ones. A little more flex in the midsole might help in this regard.

  Value

  The Summit Unknown is certainly not an expensive shoe compared to other brands’ top-end models.

  However, the true test for value is not only the ticket price but the longevity of the shoe and enjoyment whilst wearing them. In this regard, the Summit Unknown performs reasonably well.

  Summing up

  Unfortunately, the New Balance Summit Unknown is not, for me, a worthy successor to the New Balance Leadville for longer trail runs. They are a little more minimalist.

  Thus, it does not provide the same level of comfort or enjoyment of the trail. However, it is still worthy of consideration for shorter off-road runs given their low weight and superior traction.

  The quest continues…

  This expert has been verified by RunRepeat. Reviews are neutral, unbiased and based on extensive testing.
• Matt

  Level 4 expert

  92 / 100 | Road Runner Sports

  I just got this out on the trails. It's super fun, lightweight and protective ride.
• J

  Jeff Valliere

  Level 5 expert

  95 / 100 | Road Trail Run

  The Summit Unknown makes for a great race shoe or up tempo trainer for up to mid distance on a wide variety and especially technical terrain. Despite the initial blister issues, the upper of the Summit Unknown is softening and breaking in to the point where it is less of a problem, but pressure remains and I find myself being cautious.