Dura-Ace

Shimano Dura-Ace BB9000 Hollowtech II bottom brackets are engineered for smooth, dependable rotation. New seal construction helps reduce friction for a cleaner, more efficient spin.

• Available in multiple shell widths and frame interfaces to fit a variety of setups: 68mm English, 70mm Italian, and 86mm BB86.
• English and Italian options feature a 1.37-inch or 36mm shell I.D. respectively, while the BB86 version uses a 41mm shell I.D.
• Part of the Shimano Dura-Ace series, built for performance-oriented riders.
• Select the configuration that matches your frame's bottom bracket shell width and interface.