Nike Alphafly 4: announced September 17, really out October 29, the no-filter review

Nike Alphafly 4: the shoe that has to win back the crown lost to adidas

RunMorph's advice: if you're chasing a marathon PR this fall and you already race in super shoes, the Alphafly 4 belongs on your wish list. If you're new to carbon shoes, wait for the first real long-distance tests before putting 280 euros on the table.

The Alphafly isn't just another shoe in Nike's history. A prototype of this model carried Eliud Kipchoge under the symbolic two-hour barrier for the marathon in 2019, and the Alphafly 3 is the shoe the late Kelvin Kiptum wore to set the world record. But in April 2026, adidas took the crown back: two runners, including Kenya's Sabastian Sawe, became the first to run an official marathon in under two hours, both wearing the Adizero Adios Pro Evo 3. For Nike, the Alphafly 4 has to answer that challenge.

After nearly three years of waiting, this fourth generation doesn't go for a visual revolution. It looks a lot like its predecessor. But Nike says it has reworked almost every internal component to help you hold your pace late in the race, rather than just chasing that pop off the line.

Full spec sheet

What Nike claims vs what we can already see

Who is the Alphafly 4 built for?

Experienced marathoners chasing a PR

This is the shoe's natural audience. The carbon plate and dual-foam combo is still designed for fast paces held over distance, typically faster than 4:30 per kilometer.

Runners already in the super-shoe club

If you regularly race in the Vaporfly, an Adizero or a Metaspeed for your goal races, the Alphafly 4 fits the same logic: race day only, never daily training.

Super-shoe beginners: read this before you buy

The 8 millimeter drop and the 39 millimeter heel stack take some getting used to. Without prior experience in carbon shoes, try the shoe in store before running a full marathon in it.

Atomknit, ZoomX LT and Flyplate: what really changes under the hood

The Atomknit upper has been reworked for a more sock-like fit, with zoned midfoot cables that tighten the lockdown without adding weight. Nike pairs it with an integrated heel unit and a molded insole.

The biggest change is the foam. ZoomX LT, for "lightweight", is a new PEBA-based formula that Nike presents as the biggest evolution of ZoomX since the very first Vaporfly. It's claimed to be 17% lighter than standard ZoomX while delivering 8% more energy return. It's used in small amounts above and below the carbon Flyplate, combined with classic ZoomX to complete the midsole.

The Flyplate itself keeps its signature spoon shape, but with a wider base meant to improve stability and transitions at different paces. As for the visible propulsion, the two forefoot Air Zoom units are now heat-welded instead of glued, which according to Nike makes them lighter, quieter and more flexible.

The real flaw at launch: virtually zero availability before late October

For a runner preparing a fall marathon, this window is a problem: most bibs for the big end-of-year races (New York and Chicago are already behind us, but the December and January marathons are hit too) fall before wide availability. In practice, the vast majority of runners reading this won't get their hands on a pair for several weeks, whatever their budget.

The second flaw: zero independent data on durability

Nike says the Alphafly 4 should last up to 480 kilometers, which would make it an unusually durable carbon shoe if the figure holds up. But at the time of publication, no independent tester has been able to log more than a few kilometers in it: the launch was the day before. That durability promise therefore rests entirely on Nike's internal data, with no third-party cross-check for now.

The field test: what the first feedback says

A US gear publication points out that the price drop comes with no stated compromise on performance, and highlights the work on the Flyplate, now wider at the base to improve stability at different paces. It also quotes Nike's head of running footwear design, Bret Schoolmeester, who stresses weight reduction as the main lever for improving running economy.

A specialist running outlet notes that only one member of its team received a pair through the pre-launch test program, which shows how scarce the product is at this stage. The outlet promises a full review once availability widens.

French magazine Jogging International sums up Nike's intent with this version well: the brand focuses less on pure propulsion and more on efficiency and holding your pace when fatigue sets in during the second half of the marathon, an approach aimed at the overall race experience rather than just the feeling off the start line.

Nike Alphafly 4 vs Alphafly 3: what changes between generations

Nike Alphafly 4 vs adidas Adizero Adios Pro Evo 3 and Asics Metaspeed Sky Paris

The most telling comparison is price. At 500 euros, the Adizero Adios Pro Evo 3 is chasing a record performance in a single race, even if it means sacrificing almost all durability: under 100 grams, it's in a category of its own, out of reach of most amateur runners' budgets and needs. The Alphafly 4, at under 280 euros and built to last several hundred kilometers, targets a much wider audience.

Our field verdict

The Alphafly 4 arrives in a special context: Nike no longer holds the marathon world record, and the pressure to win back the edge over adidas is real. On paper, the announced upgrades (lighter foam, more precise upper, quieter Air Zoom) go in the right direction and build on the previous model rather than break from it. The real concern isn't the tech, it's access: with a trickle launch on September 17 and wide availability pushed back to October 29, most runners will have to wait before they can even try the shoe on. RunMorph will update this article as soon as independent long-distance tests are available.

RunMorph Coach's verdict

Key takeaways for your training

• Keep the Alphafly 4 for race days or key sessions, never for daily training.
• Plan at least 2 adaptation runs before wearing it for a full marathon if you've never run in a carbon-plated super shoe.
• If your goal race is before November 2026, don't count on this shoe: wide availability only arrives on October 29.
• Compare the price-to-durability ratio with your other options before spending 279.99 euros.
• Follow the first real high-mileage tests before building your whole prep around this shoe.

FAQ

How much does the Nike Alphafly 4 cost in France?
The Nike Alphafly 4 sells for 279.99 euros, 5 euros less than the Alphafly 3 at launch.

When is the Nike Alphafly 4 really available?
The official release took place on September 17, 2026 in very limited quantities on nike.com. Wide availability is scheduled for October 29, 2026, through Nike and a limited number of retailers.

How much does the Nike Alphafly 4 weigh?
Nike claims 208 grams in men's EU 42.5 and 168 grams in women's EU 39, about 5% less than the Alphafly 3.

Is the Nike Alphafly 4 suitable for runners new to super shoes?
With an 8 millimeter drop and a 39 millimeter heel stack, it requires an adaptation phase of at least 2 runs before you use it for a full marathon.