Shimano Deore FC-M4100 10 Speed Boost Double Chainset - 36 / 26T - 175mm CrankShimano Deore FC M4100 10 Speed Boost Double Chainset 36 26T 175mm Crank Engineered for maximum performance on every MTB adventure, this double Boost crankset gives you fast acceleration and control on the toughest of rides. It features a hard wearing forged alloy crank arm construction, which makes it more than capable of handling all the abuse that's associated with all day epics in the mountains. Shimano has also equipped it with a HollowTech II