
Bottom Bracket Shimano BB-RS501 BSA Hollowtech II
Shimano BB-RS501 is a 68 mm BSA threaded Hollowtech II bottom bracket for 24 mm axles, delivering smooth rotation, reliable sealing and long-lasting performance.
A bottom bracket is a key drivetrain component that connects the crankset to the bicycle frame and ensures smooth, efficient pedaling. A high-quality bottom bracket improves power transfer, reduces friction, and increases durability.
Our selection includes threaded and press-fit bottom brackets suitable for road, mountain, gravel, and city bikes. Various standards such as BSA, BB30, PF30, and BB86/92 ensure compatibility with most frames and cranksets.
We offer reliable bottom brackets from leading brands like ENDURO, FSA, SHIMANO, SRAM, and more – designed for long service life and smooth rotation even under heavy use.

Shimano BB-RS501 is a 68 mm BSA threaded Hollowtech II bottom bracket for 24 mm axles, delivering smooth rotation, reliable sealing and long-lasting performance.

The Shimano ES300 68 mm Octalink bottom bracket offers improved stiffness and efficient power transfer for Shimano Octalink cranksets.

Shimano BB-ES300 Octalink bottom bracket for 73 mm BSA frames. Hollow axle and 8-spline interface provide higher stiffness and more efficient power transfer.

First F-2001E Square Taper bottom bracket for 73 mm shells. Steel cups, two sealed bearings and an aluminum sleeve ensure durable and reliable everyday performance.

Shimano BB-MT501 HollowTech II bottom bracket for MTB use, designed for 24 mm axle cranksets and 68/73 mm BSA shells, delivering smooth rotation, durability and efficiency.

Shimano BB-UN101 is a sealed square taper bottom bracket for frames with a 68 mm bottom bracket shell and compatible square taper cranksets.


FSA MW112 spacer for MegaExo bottom brackets ensures correct installation in MTB frames with 83 mm bottom bracket shells, improving durability and drivetrain efficiency.