. Ultimate strength packed into a lighter than every design. Comes with an updated, user-friendly, Cinch system for advanced levels of versatility making these cranks ideal across the board. Made from forged 7050 aluminium alloy for enhanced levels of durability Features. Forged web bracing on arms for enhanced stiffness 7050 forged aluminium construction 30mm spindle 68/73mm, 83mm & 30mm spindle options for MTBComes with brand new cinch boost spider Compatible with Race Face BMX spindle & spider Dimensions: 165 x 170 x 175mm Buy Race Face Components from Chain Reaction Cycles, the World’s Largest Online Bike Store.