Shimano SM-BB72-41B is a press fit bottom bracket recommended for Ultegra and 105 11-speed and Metrea City cranks. Small ball bearings help save on weight. This Hollowtech II bottom bracket also has a shaft diameter of 24 mm, which has proven to be optimal in terms of stiffness and rotational efficiency.
Specifications:
Application: Road, City
Type: PressFit BB86
Shell Diameter: 41 mm
Shell Width: 86.5 mm
Axle Diameter: 24 mm (Hollowtech II)
Technical Information:
Bearings: steel
Bottom Bracket Cup Material: synthetic resin
Compatibility:
Recommended for:
- Ultegra FC-R8100, FC-R8100-P, FC-R8000, FC-6800
- 105 FC-R7000, FC-5800
- Metrea FC-U5000
- FC-RS500
Technology:
Hollowtech II
Shimano Hollowtech II is a crank bottom bracket system designed to achieve an ideal ratio of stiffness, weight and rotational efficiency. It is based on an integration of the bottom bracket and the right crank arm and works with a 24 mm axle or bearing diameter, which has proven to be optimal in terms of stability. In many cases, the bearing cups are on the outside so that the load is better distributed. High-quality precision seals ensure a long service life.
