FSA V-Drive Alloy M/Exo X-10 CranksetV-Drive offers high-end performance at a mid-range price. 7050 aluminium is used for the solid forged crank arms and bottom bracket spindle. It is designed to fit a Mega Exo bottom bracket. Chainrings are stamped from durable 7075 aluminium and are fully equipped with ramps and pins for fast, quiet shifts. The solid arms are machined at the back to save some weight without compromising stiffness, with deep arms giving maximum power transfer Features: Solid forged AL7050 alloy arms Compatible with 10-speed MTB systems X10 Compatible (SRAM Compatible) BCD: 104mm Crank Weight: 843gBuy FSA Components from Chain Reaction Cycles, the World’s Largest Online Bike Store.