The Prime X Evo was purpose-built for one audacious goal: running 100 kilometers in under six hours. South African ultrarunner Sibusiso Kubheka wore the shoe when he clocked a stunning 5:59:20 at the Adidas Chasing 100 event, becoming the first person to break the six-hour barrier at that distance. Adidas is releasing the Adizero Prime X Evo in limited quantities on January 17, 2026, priced at $500. Here’s everything you need to know about the Adidas Adizero Prime X Evo.
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Adidas Adizero Prime X Evo: Built Outside the Rules
Adidas engineered the Prime X Evo outside of World Athletics regulations, which currently cap stack height at 40mm for road racing shoes. The Prime X Evo sits at a towering 50mm, giving it a platform that prioritizes maximum energy return. That means you won’t see this shoe in sanctioned competition, but for personal bests on the open road, the rulebook doesn’t apply.
The Adidas Adizero Prime X Evo’s Specs
For a size 8.5, the numbers break down like this: the shoe weighs just 146 grams (5.1 ounces), features that 50mm stack height, and has a minimal 3mm heel-to-toe drop. That’s roughly half the weight of the ASICS Superblast 2 and less than half the weight of the Nike Vomero Premium or Hoka Skyward X. It’s an aggressive setup designed to keep runners moving efficiently over extreme distances. For comparison, the Nike Vomero Premium has the tallest stack at 55mm in the heel, with the goal of providing an “anti-gravity sensation.”
Who’s the Adidas Adizero Prime X Evo For?
Adidas is positioning this squarely at ultramarathon runners and those chasing PRs over long distances. The brand recommends it specifically for road surfaces. This isn’t a trail shoe or an everyday trainer—it’s a specialized piece of equipment for runners looking to test the outer limits of what’s possible.
The shoe was developed through months of testing and feedback with the five athletes who competed in the Chasing 100 event, making it one of the more athlete-driven designs in the Adizero lineup.
Adidas Adizero Prime X Evo Release Information
Given the limited quantities and the history attached to this model, expect pairs to move quickly when they drop on January 17 at 12 AM PST on Adidas.com. Shop for Adidas on Complex Shop.
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