Oneup components shark 10 12t 11 speed clusterride faster higher and longer with a wider range cassette thanks to the oneup shark 10 12t 11 speed cluster featuresincreases the stock shimano 11 speed cassette range by 10compatibility shimano 11 spd 11 40 11 42 oneupd shimano 11 45 and 11 50 cassettesfreehub requirement oneup minidriver or compatiblecassette range improvement 10 buy oneup components from chain reaction cycles the worlds largest online bike store