Dura-Ace

Shimano's Dura-Ace bottom brackets bring the performance and refinement expected from the top-tier Dura-Ace line. Designed for smooth rotation, these bottom brackets feature a new seal construction aimed at reducing friction and enhancing durability. Available in multiple configurations to fit a range of frame standards.

• New seal construction for smoother rotation and improved performance
• Hollowtech II compatible design integrates with Shimano cranksets
• Available in 68mm English (1.37″ I.D.), 70mm Italian (36mm I.D.), and 86mm BB86 (41mm I.D.) versions to match your frame
• Engineered for precision and reliability, consistent with the Dura-Ace name