Shimano Dura Ace BB-R9100 HollowTech II Bearing Cups - 68mm English Thread

Shimano BB-R9100 Dura-Ace HollowTech II Bottom Bracket - 68mm English Thread. - Shimano Dura Ace Hollow Tech II bottom bracket assembly - Minimal bearing interface gives superbly smooth rotation - Distinctive style that exudes quality and perfection - Use TLFC34 or TLFC24 in conjunction with TLFC36 adaptor tool for installation and removal Bottom bracket bearing set for the HollowTech II Dura Ace crankset which is the ultimate crankset for stiffness, whilst keeping weight low for performance riding and racing. Shimano Dura Ace Hollow Tech II british threaded bottom bracket to fit a 68 bottom bracket shell width, for road use.