
The Shimano M770 XT Hollowtech 2 Chainset is a high performance chainset from the classic ATB group offering the most advanced features. Forged Hollow Tech II aluminium cranks offer unrivalled strength-to-weight ratio. Lightweight construction with external super smooth bottom bracket bearings for efficient use. Drilled steel & carbon composite construction middle ring combined with a thicker aluminium double anodized 44 tooth & plated aluminium 22 tooth ring for excellent rigidity & durability. SG-X chainrings delivering a smooth precise shift & are Hyper Drive compatible. Stiffness & strength increased with advanced design due to wider spaced bearings & oversized axle. 44 / 32 / 22 tooth 9-speed chainrings for a wide gear ratio range. We recommend that this bottom bracket is initially installed by Evans to ensure perfect bottom bracket facing & fit. Comes complete with bottom bracket for 68 & 73 mm frames. Weight: 853 g for M770 in 175 mm.