adidas Terrex Agravic Speed Ultra Reviews

Raced several times in the Agravic Speed Ultra (first version): fast on smoother terrain, but the upper shreds their heel and pinky toes.

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

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.

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.

A true trail racer that finally matches its road counterparts, and the first successful adaptation of Adizero tech to trails. At $220 it undercuts the Ultrafly and Tecton X 3.

Despite its flaws, it's his favourite race shoe: an outstanding midsole and an upper that improves with time. The minimal outsole failed in mud, and he had to change shoes after 15 miles of a wet race. The heel collar is slightly open.

The best trail racer he has tested and the closest to a road super shoe: comfortable for 30 ultra miles even as a heel striker. The narrow heel and midfoot felt less secure on rocky Chamonix descents than the Ultrafly.

The Agravic Speed Ultra is faster than the Nike Ultrafly but gave them arch blisters after just 20 km, so they're selling it.

Ran a 50K with 2,500 m of climbing in the Agravic Speed Ultra: it performed amazingly, but left two blisters and arch rubbing; buying a second pair anyway.