A footwear designer's inside look at creating Allyson Felix’s Olympic-winning spikes

On Aug. 7, American Olympian Allyson Felix entered her final 400-meter race as the world's most-decorated woman track athlete. Approximately 48.36 seconds later, Felix crossed the finish line as the most-decorated track athlete in the U.S.. “It was incredible,” said Mike Friton of Friton Design, one of several former-Nike designers and Portland companies that collaborated to create Felix’s “Spike One” track shoes in just six months. Of course, Felix’s shoe brand is actually her own:…