The race shoe built for what happens after the miles pile up. Nike’s newsroom has detailed Alphafly 4 — the latest flagship marathon racer — and set a clear next window: broader availability October 29 at nike.com and select retail after an early, limited September 17 release.

Per Nike’s September 17, 2026 newsroom release, Alphafly 4 delivers 10% more energy return than its predecessor and is 5% lighter in a men’s size 8.5. The package pairs a new Atomknit upper with ZoomX LT foam, updated Air Zoom units, a carbon-fiber Flyplate, and a Fast Shot outsole — aimed at holding pace when fatigue sets in late in the marathon.

Nike has also framed Alphafly 4 inside its race-day system of speed alongside Apex and Swooshfly. For this silhouette, the actionable date is the October 29 broader rollout.

Key details
Model: Nike Alphafly 4
Tech: Atomknit · ZoomX LT · Air Zoom units · carbon Flyplate · Fast Shot outsole
Energy return: 10% more than predecessor (per Nike)
Weight: 5% lighter (men’s 8.5, per Nike)
Release: early limited Sep 17 · broader October 29, 2026
Where: nike.com + select retail

Source: Nike Newsroom. Images: official Nike newsroom campaign assets (as-is; no crop/remaster).

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