|adizero XT Boost|
|adizero XT Boost. Boost material is only under the forefoot back of the toes. Heavily lugged Continental Race Rubber outsole|
|adizero XT Boost|
The upper has no seams or overlays except around the toe box and running back along the rand, at the midsole. There are underlays on either side running from the last lace hole backwards towards the midsole. XT Boost has a roomy, unstructured toe box, if a bit pointy at the very front, with surprisingly no hint of foot rotation or ankle turning on rougher terrain. This is likely due to the rear midsole stability, the stretchy debris collar and thin but substantial TPU plastic straps running from the heel to the first lace hole on top of the stretchy debris collar which all together hold the foot securely to the platform.
|adizero XT Boost|
The result is a fantastically stable, agile and comfortable ride on all trail surfaces, including roads, mud, and dirt trails. The forefoot is flexible and easy running, very adaptable to both uneven terrain and road. It does lack the snappy toe spring effect of its close road cousin the Adios Boost (review) with its Torsion plastic plates below the outsole and above the Boost layer.
While lugged and on the firmer side the Boost and outsole provide decent responsive cushioning even on road, it is the finest, smoothest running trail shoe overall of the 2015 crop I have run in to date for faster paced shorter runs. For many it will be a fine longer run shoe if the terrain is not too rocky and technical. I would not hesitate to run a dirt road or even road half in them. I the Antelope Island 25K race in them on a mix of smooth trails, lots of vertical, and some rocky patches with complete assurance. They were also fine on rockier rooty NH trails but maybe not my first choice for that kind of terrain especially if out for an easy run.
Lacking a rock plate it may be a bit thin in the forefoot for the rockiest of trails but the lugs and Boost provide decent 4mm of protection there. Not the cushiest of rides, say when compared to a Hoka Challenger ATR(review) or Speedgoat(review), New Balance Fresh Foam Trail(review) or its heavier duty cousin the upcoming Raven Boost(review), the XT Boost plays in the same category of lighter weight agile trail runners with a touch of stability such as the Montrail Fluid Flex ST (review), the considerably firmer and lighter Salomon S-Lab Sense X-Series (review) and is more protective in the forefoot than the LaSportiva Helios SR reviewed here.
|adidas Terrex Boost|
- XT is close to 1.75oz or 50 grams lighter and its noticeable
- Terrex Boost has an almost full Boost midsole with orange TPU stabilizing
- XT has lower profile lugs,
- XT has a more comfortable roomier but less burly upper with laces instead of quick pull
- XT has a heel counter, the Terrex has none
- forefoot run feel and flex is actually quite similar
- Terrex is massively burly maybe a bit to much, so for all but the roughest trails yet still agile but with a noticeable weight penalty.
- XT is $20 less than the Terrex.
Adizero XT Boost is a great shoe for fast paced all terrain running, including some roads. Substantial lugs grip exceptionally well but are soft enough not to be in the way on smoother terrain and road. It is flexible, decently cushioned with a distinct cushion and pop from the Boost forefoot and is surprisingly stable on rougher terrain for having such an unstructured upper. I sized up half a size.
Adizero XT Boost is a finalist for my Trail and Hybrid Shoe of the Year.
Available this summer.
The XT Boost will be joined by the $200 8.8 oz Adizero XT Prime Boost with its Prime knit upper. I question the support provided by an all Prime knit upper without the plastic lace to heel straps of the XT Boost and would for sure go true to size in this version. The Prime is one fantastic looking shoe.
If you are not familiar with Running Warehouse they are a major online store specialized in running in the US.
US readers the XT Boost is available from Campsaver at the links below.
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