Class-leading XTR 12-speed crank set, integrating the bottom bracket and crank set into a strong, rigid, yet lightweight unitDirect mount chainrings are lightweight and easy to replace while providing increased rigidity, can be set up as single or doubleIntegrated bearing preload design is lightweight and makes installation and adjustments easier than everSuper-lightweight HollowTech II cold forged Duralumin crank arms - hollow design saves weight whilst increasing rigidity and durabilityEasy to use splined bottom bracket spindle connection provides a rigid and secure interface between crank and spindleWith a 52mm chain line and a 162mm Q-factor (1x set up) ideally suited for XC use in conjunction with 10-45T or 10-51T cassettecrank set supplied without bottom bracket and chainringsCompatible with all 12-speed direct mount DCE XTR chainrings, please use SM-CRM95 chainringsFor use with 12-speed HG+ chains onlyChainring not included