adidas Terrex Agravic Speed Ultra Reviews

Found the Agravic Speed Ultra super unstable.

Owns a couple of Agravic Speed Ultras: an amazing, very fast shoe once your ankles adapt to the instability, though it needs bigger lugs.

With 32 pairs in two years, they find the Agravic Speed Ultra a bad shoe: great foam, upper and rods, but it forces supination and ankle rolls.

Had to size down half a size in the Agravic Speed Ultra to fix heel slip; great for faster trails but dicey on technical terrain.

They own the Adidas ASU and find it very fast but with no stability, so they would not pick it unless the trail is perfect.

After a 30 km run they decided the shoe was not for them: a very narrow arch caused blisters on both feet and it felt unstable on rocks.

Really happy with the Agravic Speed Ultra, but it's not very stable on rockier terrain.

More than 700 km over four months, starting with a steep technical trail marathon. They found it light, poppy and fast in a straight line, with a true-to-size fit that gets narrow at the toe box and a secure heel and midfoot hold. The lateral stability is very poor, though: they tweaked an ankle every couple of weeks, once badly enough to cost them a race and weeks of training. Best kept for smooth, easy trails.

It held up well through 100 miles and stays stable on flowy trails thanks to a wide base. It felt tippy on rocky terrain, the short lugs lack bite in loose or wet conditions, and it runs long, so size down half a size.

Superb cushioning and energy return, with no compaction after 100 miles. Hard to manoeuvre on rocky or rooty ground at speed, and the extreme heel bevel is bad for slow heel striking. Needs a skilled runner, and may feel tippy to novices.