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- Nike says the Alphafly 4 delivers 10 per cent more energy return than the Alphafly 3 while weighing 5 per cent less in a men’s size 8.5.
- This marathon racing shoe has been reworked with ZoomX LT foam, revised Air Zoom units, a carbon-fibre Flyplate and a new Atomknit upper to help runners maintain efficiency as fatigue sets in.
- The Nike Alphafly 4 will be available on 29 October 2026 for AUD$400.
“Marathon Speed” doesn’t sound all that quick at first. Next to a 100-metre sprint, it’s a swift walk in the park. But try holding that quicker pace over 10, 15, 20, or 42.2 kilometres, and you’ll see why the hard part isn’t finding “marathon speed”; it’s keeping it. Plenty of runners can maintain the right pace with fresh legs. But once fatigue kicks in and your stride starts changing, that’s where Nike’s new shoes step in.
Its latest flagship racing shoe, the Alphafly 4, delivers 10 per cent more energy return than the Alphafly 3 and weighs 5 per cent less in a men’s size US8.5. Better still, they’ve reworked nearly every major component of the shoe in the process, making this more than a sequel.
Nike says the goal of this reboot is to help more runners – everyone from elite marathoners chasing podiums to everyday runners hunting personal bests – carry that “marathon speed” deeper into the race. AUD$400 is a steep investment for race day running shoes, but you’ve got to like what Nike has put together to help those who can afford “marathon speed”.
1/8Nike Alphafly 4 – Key Specs
- Price: AUD$400
- Weight: Approx. 208g, men’s UK 9
- Heel-to-toe drop: 8mm
- Use: Half-marathon and marathon road racing
- Upper: Atomknit
- Midsole: ZoomX and ZoomX LT
- Plate: Carbon-fibre Flyplate
- Forefoot: Dual Air Zoom units
- Outsole: Fast Shot
- Release: 29 October 2026
The Alphafly 4 Is Trying to Make Speed Last Longer
Lasting longer is one hell of a claim to make. Fortunately for Nike, this one’s about race pace. And it’s based on more than just one piece of running tech. Nike has done the obvious things to its Alphafly 4: trimmed the weight and made the shoe more efficient on the pavement.
The biggest change is adding ZoomX LT foam to the mix, which Nike says is up to 17 per cent lighter than its standard ZoomX foam while returning 8 per cent more energy. Standard ZoomX hasn’t disappeared, though. Both foams are used around the shoe’s carbon-fibre Flyplate, with the lighter LT material helping reduce weight while maintaining the cushioning needed over longer distances.
Its familiar dual forefoot Air Zoom units have also been updated, with Nike claiming a softer response, more energy return and less noise underfoot. The carbon-fibre Flyplate retains Alphafly’s curved shape to provide stability and propulsion. It also gets a new Atomknit upper with zoned midfoot cables and an integrated heel structure to keep your foot secure without adding grams.
Even the outsole has been reworked, featuring Nike’s new Fast Shot rubber, which they say adds more road grip for less weight.
Altogether, the changes focus on reducing fatigue rather than pushing your top speed. Nike Sport Research Lab senior principal Emily Farina says the company spent years studying how running mechanics change during a marathon. They then used that research to refine the shoe around maintaining efficiency as fatigue sets in.
An extra 10 per cent energy return already sounds impressive, but Nike wants those gains to help a runner keep moving efficiently once they are 20 or 30 kilometres into a race and their form begins to deteriorate.
Don’t believe the metrics? Nike already has a pretty useful race-day result to point to: athlete Addisu Gobena raced in the Alphafly 4 during his recent marathon win in Sydney. He said the shoe gave him confidence when the race became difficult and he needed to trust what was underneath him.
“As athletes, we are always chasing what comes next,” he added. “And I believe Alphafly 4 shows how much opportunity exists to push marathon performance forward.”
1/5$400 Is Serious Race-Day Money
Nike may say the Alphafly 4 is a shoe for marathoners ranging from elite athletes to everyday runners chasing PBs, but cost is the ultimate decider.
For an elite runner, it’s a purpose-built performance tool. For an amateur committed to a few months of marathon training, AUD$400 could be a worthwhile race-day investment if the goal is to shave time off a PB.
The Alphafly 4 will hit stores on 29 October through Nike and selected retailers.
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