Totally reinvented for the 2016 rio olympics the io is faster than everthis wheel has won more medals than any other wheel on any racetrack in the world at london the io won 90 of the medals 27 in the velodrome and the new generation io rio delivers the marginal gains needed to win even more completely redesigned it features a wider rim to better integrate the slightly larger tubular tires now popular with the world39s best athletes each of the five spokes also now adopts a naca profil