The bottom bracket bearings for the HollowTech II FCR9100 crankset, which is the ultimate crankset for stiffness whilst keeping weight low for performance riding and racingMinimal bearing interface gives superbly smooth rotationDistinctive style that exudes quality and perfectionRequired for installation of FCR9100 chainset,Use TLFC34 or TLFC24 in conjunction with TLFC36 adaptor tool for installation and removalEnglish threads for 68mm shell