A high performance chainset from the classic ATB group, offering the most advanced featuresForged HollowTech II aluminium cranks offer unrivalled strength-to-weight ratioLightweight construction with external super smooth bottom bracket bearings for efficient useSG-X anodized aluminium chainrings deliver a smooth precise shiftStiffness and strength increased with advanced design due to wider spaced bearings and oversized aXLe48 / 36 / 26 tooth 9-speed chainringsWe recommend that this bottom bracket is initially installed by a bike shop to ensure perfect bottom bracket facing and fitComes complete with bottom bracket for 68 and 73 mm framesWeight: 853 grams for M770 in 175 mm
