• A high performance crankset from the classic MTB group. • Forged HollowTech II aluminium cranks offer unrivalled strength-to-weight ratio. • Lightweight construction for external super smooth bottom bracket bearings. • For use with 12-speed Dyna-Sys DCE single chainrings. • SM-CRM86 DCE direct mount chainrings are available in 28T, 30T, 32T, 34T and 36T. • 55mm chain line for use with 148mm rear axle width. • 176mm Q factor.