Nike Alphafly 4, or the shoes that were already racing
Six days before Sabastian Sawe crossed the London finish line in 1:59:30, Charles Hicks finished seventh at the Boston Marathon in 2:04:35. On his feet: a pair of Nike shoes with no name, no price tag, and no announcement. They appeared on the World Athletics approved-shoe list in February 2026, registered under a development code, cleared for road races but not yet offered for sale. Nike said nothing.
That shoe was the Nike Alphafly 4, and it launched officially on September 17, 2026 — five months after its first competitive appearances and four months after Adidas used the Evo 3 to shatter a barrier the entire running world had spent decades chasing.
The Alphafly 4 is built around a new foam compound called ZoomX LT, which is 17 percent lighter than standard ZoomX and returns 8 percent more energy. Nike layers it above and below the shoe’s carbon-fiber Flyplate, itself redesigned with a wider base and a more dramatic scoop that gives the forefoot a steeper rocker. Two Air Zoom units in the forefoot add a second layer of propulsion. The result weighs 208 grams in a men’s size 10 and costs $280 — $220 less than the Adidas shoe it is implicitly answering.
That price gap has a context. When Adidas released the Evo 3 at $500 on April 25 — one day before London — it sold out in minutes; resale prices reached $3,000 to $4,600. Every top-five finisher in London wore one; most received it from Adidas directly. The shoe that broke two hours was functionally unavailable to most of the runners in the race it was designed for.
Nike has not been the dominant force in elite road racing for most of the last two seasons. The Vaporfly and its successors led the field from 2017 through roughly 2022; since then Adidas has taken progressively more podium positions, culminating in the clean sweep at London and, ten days after the Alphafly 4’s debut, a second consecutive podium sweep at Berlin. The Evo 3 won Chicago in October as well. Nike’s new shoe launched into an autumn dominated by the shoe it was designed to unseat.
What the Alphafly 4 represents is not a single dramatic leap but a credible system rebuild — new foam, redesigned plate, new upper, new outsole — executed in a single generation. Whether that is enough to close the gap at the next World Marathon Major is a question the shoe hasn’t answered yet. What it has already done is restore a sense of genuine competition to a space where, for most of 2026, only one company seemed to have the script.
What the sport keeps asking — what a shoe is allowed to do, and who is allowed to wear it — is a question older than carbon fiber. The foam just made it louder.
Sources
- Charles Hicks becomes fastest-ever British-born marathon man — Athletics Weekly — Hicks’s 2:04:35 at Boston 2026 wearing Nike prototype shoes.
- Nike Alphafly 4 — Nike Official Newsroom — ZoomX LT foam specs, Flyplate redesign, Air Zoom units, 10% energy return improvement, release timeline.
- First Look: Nike Alphafly 4 — The Running Channel — weight (208g men’s size 10), stack height (39/31mm), ZoomX LT foam comparison, $280 retail price.
- World Athletics broke its own rule around the shoe worn by Sawe — Athletics Illustrated — Adidas Evo 3 release date (April 25), $500 retail price, $3,000–$4,600 resale prices, availability concerns.
- Berlin Marathon 2026: Adidas Adios Pro Evo 3 podium sweep — Marathon Handbook — Adidas Evo 3 sweep of Berlin podium, ten days after Alphafly 4 debut.