It is just under a decade since Nike, in a 2017 white paper hand-delivered to a Monza Formula 1 circuit, told the world it was going to break two hours in the marathon. The shoe it built for that "Breaking 2" moonshot, the original Vaporfly 4%, did exactly what its name implied for everyone who put it on, redrew the marathon record book between 2018 and 2025, and still, on the morning of Sunday's TCS London Marathon, had never enabled a runner to break two hours in a record-eligible race. Adidas, which spent that decade as the unfussed challenger brand, did so on Sunday with two athletes inside the same 11 seconds. Sabastian Sawe ran 1:59:30, Yomif Kejelcha 1:59:41, and the entire podium wore the Adidas Adizero Adios Pro Evo 3.
The shoe that did the work weighs 97 grams in a men's UK 8.5 — about a third the mass of the Vaporfly 4% that started this whole project — and is the third generation of a model Adidas has now used to win every World Marathon Major it has contested since the autumn of 2024. The Pro Evo 3 launched on the Wednesday before London at $500 a pair, a price point Adidas has been comfortable defending on the basis that the shoe is hand-glued in Germany, ships in serialised limited runs of around 1,200 pairs and is, in practice, a one-marathon-and-done racing implement. Wear-test data the brand released through Loughborough on Saturday placed running economy at 1.6% better than the Pro Evo 2 and roughly 4.0% better than the original Adios Pro 1.
Nike's response on Monday was conspicuously short — a one-line statement from chief executive Elliott Hill congratulating Sawe and reiterating that the next generation of Alphafly was already in the hands of athletes. Prototype photos of the Alphafly 4, which surfaced earlier this month and again at the Eugene Marathon expo, suggest a closed-deck Zoom forefoot, a slightly trimmed midsole stack and a relocated air pod under the midfoot. Nike has indicated a 26 June consumer launch with a £285 to £305 retail price in the United Kingdom; that is still below Adidas's $500 sticker, but closer than the gap that defined the Vaporfly era. The market read Sunday's race as decisive: Adidas closed up 5.1% in Frankfurt on Monday, adding roughly €2.1 billion to its market capitalisation in a single trading session, while Nike opened 1.7% lower in New York before recovering most of those losses.
Underneath the corporate scoreboard, the wider running industry is being asked, again, where this leaves the everyday runner. World Athletics' regulations on shoe construction — a 40 mm maximum stack height for road and a single embedded plate — were tightened in 2020 and have not been touched since, and the Adios Pro Evo 3 sits inside both rules with about 7 mm of headroom on stack. Brands that do not have the laboratory and supply chain to engineer at the new frontier — On, Puma, New Balance and Asics among them — have all moved towards lighter racing shoes with thinner uppers, lower-density supercritical foams and PEBA-based blends, but none has so far produced a marathon win at a Platinum-label race in 2026. The shoes that beat the Pro Evo 3 home over Sunday's last mile do not yet exist.
Whether Sawe's 1:59:30 settles the "technology doping" question, or merely sharpens it, is a debate the sport will spend the next year having. Eliud Kipchoge's 2019 Vienna run was always carefully framed by Nike as an exhibition for that exact reason; Sawe's London performance, by contrast, was on a record-eligible course, with drug-testing protocols, with no rotating pacers and on a shoe sold to the public. The argument that the achievement belongs to the athlete first and the brand second is the only honest one available — Sawe ran the splits, took the 30k surge, held form to the Embankment — but the next generation of shoes will arrive in shop windows and finish-line photos with a credibility no super-shoe has ever previously commanded. Adidas will spend the rest of 2026 trying to extend the lead it took on Sunday. Nike will spend it trying to remember what it felt like, in 2017, to be the company writing the white paper.