BB86 pressfit bottom bracket Shimano Dura Ace ISMBB9241B

Designed for cyclists seeking pure performance, the Shimano Dura-Ace SM-BB92-41B bottom bracket (ref. ISMBB9241B) represents the top of the range in PressFit BB86 systems. Developed for Dura-Ace groupsets, it offers exceptional performance, unrivalled smoothness of rotation and optimum reliability on the road and in competition.

Thanks to its high-precision bearings and optimised design, this bottom bracket significantly reduces friction, thereby improving pedalling efficiency. Its advanced sealing system minimises water and dust ingress whilst reducing rotational resistance by up to 50 per cent, ensuring consistent performance over time .

Compatible with PressFit BB86 standard frames (41 mm diameter, 86.5 mm width) and Shimano Hollowtech II cranksets with a 24 mm axle, it ensures perfect stiffness and direct power transfer. Its aluminium construction and lightweight internal components make it an ideal choice for demanding cyclists and competitive riders.

Key features:

• Dura-Ace range: maximum performance and reliability
• High-precision bearings for ultra-smooth rotation
• Reduced friction for improved efficiency
• Enhanced water and dust resistance
• PressFit BB86 standard (41 x 86.5 mm)
• Compatible with 24 mm axle Shimano Hollowtech II