Shimano SM-BB72-41B Press-Fit Bottom Bracket

The Shimano SM-BB72-41B is a Press-Fit bottom bracket designed for road and gravel cyclists seeking maximum pedaling efficiency, excellent durability, and smooth rotation. Part of the Ultegra family, it uses Hollowtech II technology to optimize power transfer while reducing weight. Thanks to its high-quality Shimano bearings and seals, it offers remarkable reliability in all conditions.

INFORMATION

Construction

The SM-BB72-41B uses reinforced polymer cups and precision bearings designed to reduce friction while improving durability. High-precision Shimano seals effectively protect the bearings from water, dust, and contaminants.

Performance

Developed around Hollowtech II technology, this bottom bracket ensures excellent stiffness and efficient rotation to maximize power transfer. Its low-friction bearings provide smooth and consistent pedaling, ideal for long road rides, gravel, and triathlon.

Compatibility

The SM-BB72-41B is designed for Press-Fit BB86 frames with an internal diameter of 41 mm and a bottom bracket shell width of 86.5 mm. It is compatible with Shimano Hollowtech II cranksets with a 24 mm spindle, including Ultegra, 105, GRX groupsets, and several other Shimano road models.