Nike said the Alphafly shoe worn by Eliud Kipchoge to break the two-hour maratho...
LONDON - Nike said the Alphafly shoe worn by Eliud Kipchoge to break the two-hour marathon barrier would be legal under World Athletics’ new rules and that widespread reports of its shoes containing triple carbon plates are false.
The latest incarnation of the shoe is the Air Zoom Alphafly Next%, with one curved, carbon plate, an insole thickness of 39.5mm, as well added air pockets. The new rules - the WA’s first governing running shoe specifications - state road shoes must have insoles no thicker than 40mm and not contain more than one rigid, embedded carbon fiber plate.
“We don’t make running shoes with three plates,” a Nike spokesperson told Reuters, adding that the midsole thickness was also within the new parameters. Industry speculation that Kipchoge’s shoes were triple-plated was based on Nike’s 2018 patent for a shoe containing triple plates. In the unofficial Vienna marathon, Kipchoge wore a prototype which would seemingly have been at odds with the prevailing rule for World Athletics-sanctioned races that said any shoe should be “reasonably available”, though that rule was never applied by the governing body through the various prototype versions of the shoe, which was launched as the Vaporfly in 2016.
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