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Alberto Stretti on Twitter: "Galen Rupp ran 10000m without normal spikes- shoes...to be relaxed for marathon?? ...interesting techincal argument https://t.co/nw3CtFpIA4" / Twitter
Material Matters: 2016 Olympic Recap - Sneaker Freaker
Olympics 2016: Nike unveils new track spikes for Rio - Sports Illustrated
Check Out Nike's Crazy New Machine-Designed Track Shoe | WIRED