The production Alpha Flys conform to these new standards, with one full-length carbon fiber plate and a roughly 39mm stack of ZoomX foam, the super-responsive material that helped to make the earlier models in the % line the most popular marathon shoes on the market.
Shoes without spikes can have soles no thicker than 40mm and can only contain one embedded plate or blade of any kind (Kipchoge's prototype shoe from the Breaking 2 run was rumored to have up to three plates). Ahead of the now-delayed 2020 Olympic Games, the World Athletics Council published a new set of rules to clarify what exactly would be fit for the road and track going forward.
Some even called for bans of the technologically advanced shoes. As Nike and other companies have continued to develop their racing shoes, which are largely designed to improve running economy, the governing bodies of the running world responded. The shoe will also contain a new knit upper Nike calls Atomknit.The Alpha Fly might look funky, but there's method-and strict design parameters-behind the madness. These are all updates from its predecessor, the Nike ZoomX Vaporfly Next%. The long-distance racing shoe contains a single carbon-fiber plate, ZoomX cushioning, and Zoom Air Pods. The headliner for this announcement is the Nike Air Zoom Alphafly Next%. Over the past few years, versions of the Nike’s Vaporfly series have evolved to make runners even faster and help them set world records, like when Brigid Kosgei broke the women’s world record at October’s Chicago Marathon. New construction in running shoes-including implementing carbon-fiber plates and advanced foam technology-have been controversial since they debuted on runners’ feet in 2016.
Though this new design will differ from the Air Zoom Vaporfly Next%, it will likely bring another generation of controversy and records with it. Those shoes were rumored to have as many as three carbon-fiber plates in them, which is illegal according to the new World Athletics guidelines.įans have long awaited to get their hands on them, however, and it appears that time will finally arrive in 2020. The Alphafly series has been mythical since Eliud Kipchoge wore them to break the two-hour marathon barrier in October.
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