Great value 2-piece design 12-speed double chainset. All-mountain crank set is tough and aggressive yet also lightweight. Forged crank arms rigid whilst being incredibly strong and durableKey Features:HollowTech II integrated bottom bracket design uses a wide bearing placement with a large axle diameter for increased stiffness, efficiency and added durability,We recommend that the bottom bracket is initially installed by a bike shop to ensure perfect facing and fit,Direct mount chain ring,For use with 12-speed HG MTB chains only,With a 48.8 mm chain line for use in conjunction with 135 / 142 mm O.L.D...