Nike has confirmed a broader global rollout of the Alphafly 4, the company's headline marathon racer, after the model's initial January launch was kept tightly aligned with Japan's collegiate Ekiden season. The shoe began appearing on UK and European stockists this week at a recommended retail price of £290, with North American availability following on 22 May at a US price point of $310. The Alphafly 4 had until now been sold in limited drops through Nike's NRC app and via a handful of Tokyo flagship stores.
The redesigned upper is the most visible change from the Alphafly 3. Nike has removed the exposed Zoom Air windows that characterised previous editions, swapping them for an internal forefoot pod system that the company says delivers the same propulsive return with less lateral wobble. A new Atomknit 3.0 upper is rated by Nike at around 24 per cent lighter than the previous generation, with a total claimed weight in a UK 9 of 209 grams.
The carbon-plate geometry has also been tuned. The shoe retains the dual-density ZoomX midsole architecture but the plate now extends further into the heel and incorporates a steeper rocker profile from the midfoot forward. Early independent testers, including the team at BelieveInTheRun, report that the new geometry feels noticeably more aggressive at marathon pace than the Alphafly 3, with an effect closer to the Vaporfly Next% 3 in transition speed.
On the road the shoe has already accumulated a quietly impressive list of marathon performances. Charles Hicks ran 2:04:35 at the 2026 Boston Marathon in an Alphafly 4 prototype, the fastest mark ever recorded by a British-born runner, and a further nine of the top 20 men's finishers in London on 26 April are confirmed by Nike to have worn unbranded versions of the same shoe. Nike's elite Kenyan training group, including Berlin champion Sabastian Sawe, are expected to debut the production model at the Berlin Marathon in September.
For amateur buyers, the most pressing question remains durability. Nike's published guidance suggests around 250 to 320 miles of racing and tempo use before noticeable midsole compression, broadly in line with the Alphafly 3. At £290 in the UK and US$310 in North America, the shoe sits at the very top end of the carbon-plated category, alongside Adidas's Adios Pro 4 and the new Brooks Hyperion Elite 6. Initial UK stock is expected to be limited through the end of June, with full availability not arriving until pre-autumn marathon season.