Shimano Dura-Ace English Bottom Bracket 68mm RGroup_3DE2597A047C1388A4B66648744AAE5C69E78667 With a carbon composite construction

With a carbon composite construction and optimized geometry

Degrease chain thoroughly before initial application

or DJ bike

whether on rugged trails or diverse surfaces

Bio Formula easily cuts through tough grease

Shimano Dura-Ace English Bottom Bracket 68mm RGroup_3DE2597A047C1388A4B66648744AAE5C69E78667 With a carbon composite constructionThe Shimano Dura Ace R9100 English Bottom Bracket 68mm is a "last chance" item, available for in store pickup only where stock remains. This bottom bracket features smaller, lightweight bearings and an advanced seal construction for smoother rotation and increased durability, designed to work optimally with the Dura Ace R9100 crankset for superior stiffness and a smoother pedal stroke.