The Shimano Deore FC-M4100 mountain bike crank delivers precise and reliable shifting for 2x10-speed drivetrains. This 2-piece crank offers a 36-26T gear combination and a 51.8 mm chainline that is compatible with 148 mm frames.2-Piece Crankset increases rigidity of crankset with less weight and transmits pedalling force efficientlyGreat value Deore M4100 2-piece design chainset for 10-speed Dyna-Sys MTB HG-X transmissionsForged crank arms rigid whilst being incredibly strong and durableHollowTech II integrated bottom bracket design uses a wide bearing placement with a large axle diameter for increased stiffness, efficiency and added durabilitySG-X chainring with patented spike pins give smooth and fast gear shifts under loadWe recommend that the bottom bracket is initially installed by a bike shop to ensure perfect facing and fit51.8 mm chain line for use with 148 mm O.L.D. frames10-speed Dyna-Sys compatible