A practical choice for road or gravel-bike owners replacing a worn press-fit bottom bracket in an 86.5 mm BB86 frame with compatible Shimano HOLLOWTECH II cranks.
The Shimano SM-BB72-41B is a press-fit bottom bracket for frames with an 86.5 mm shell width and 41 mm internal diameter. It is designed for Shimano HOLLOWTECH II cranksets using a 24 mm spindle, making it a practical replacement for compatible road and gravel builds.
Inside, widely spaced bearings support the bottom-bracket axle to help maintain stable pedalling and efficient power transfer. Shimano bearings and seals provide the protection you want from a daily-use component, while the compact design keeps the claimed weight to 69 g.
Before ordering, check your frame’s bottom-bracket standard and shell dimensions rather than relying only on the bike’s groupset. The SM-BB72-41B is listed for a broad range of Shimano Ultegra, 105, Tiagra and Sora HOLLOWTECH II cranksets, as well as selected GRX and other 24 mm Shimano cranksets.
BB86 press-fit format
Made for frames using an 86.5 mm bottom-bracket shell width and 41 mm internal diameter.
HOLLOWTECH II interface
Designed to work with Shimano HOLLOWTECH II cranksets using a 24 mm spindle.
Stable axle support
Widely placed bearings support the bottom-bracket axle for steady, efficient pedalling.
Reliable sealing
Shimano bearings and seals help protect the bearing system during regular riding.
Lightweight replacement
The claimed weight is just 69 g, helping keep your drivetrain hardware light.
Broad Shimano compatibility
Listed compatibility includes selected Ultegra, 105, Tiagra, Sora, GRX and other Shimano 24 mm cranksets.
Long-service design
Built for dependable operation and a long service life when correctly matched to the frame and crankset.
General
Dimensions and weight
Construction and performance
Colour
HOLLOWTECH II
A 24 mm axle and bearing system designed to balance stiffness, strength, weight and rotating performance. The bearing arrangement supports efficient power transfer and stable pedalling, while high-precision sealing helps maintain durability over time.
Press-Fit bottom bracket
The press-fit design uses widely spaced bearings to support the bottom-bracket axle securely, helping deliver efficient power transfer while avoiding a conventional threaded installation.
Shimano is a Japanese component brand founded in 1921 in Sakai, Osaka. The company began with bicycle component manufacturing and has grown into a global business focused on bicycle components, fishing tackle and rowing equipment, while keeping its headquarters in Sakai.
In cycling, Shimano is best known for building complete component ecosystems that span road, mountain, gravel, commuting and e-bike use. Its range covers drivetrains, brakes, wheels, pedals, shoes and related parts, and the brand has had a long presence in Australia through a local business established in Sydney in 1992.
