Bottom bracket Shimano BB-RS501 hollowtech 2

Shimano BB-RS501 Hollowtech II bottom bracket – 68 mm / BSA 1.37” x 24T thread

The Shimano BB-RS501 bottom bracket is designed for modern Hollowtech II drivetrains, offering an excellent balance of smooth rotation, stiffness, and durability. Suitable for road bikes, MTBs, and hybrid bikes with compatible frames, it ensures efficient power transfer and smooth pedaling performance.

Compatibility and technical specifications

This model is intended for frames equipped with a threaded BSA bottom bracket standard:

• Bottom bracket shell width: 68 mm

• Thread type: 1.37” x 24 TPI (BSA standard)

• Crank standard: Hollowtech II

• Mounting type: external bearing system

• Compatibility: Shimano Hollowtech II road and MTB cranksets

Thanks to its external bearing design, the load distribution is improved, resulting in increased stiffness and better pedaling efficiency.

Performance and Shimano reliability

The BB-RS501 is engineered to meet the demands of cyclists looking for smooth and long-lasting drivetrain performance. Its sealed bearings help protect against dust and moisture, extending the lifespan of the component even under frequent or intensive use.

This bottom bracket is especially appreciated for:

• Low friction while pedaling

• High durability over long distances

• Wide compatibility with standard BSA frames

• Easy installation and replacement

Product condition

This bottom bracket is brand new and unused, however:

• the packaging has been opened

• the outer packaging is dirty or not properly stored

The component itself remains new and fully functional, ensuring full performance once installed.

Why choose this bottom bracket ?

The Shimano BB-RS501 is a reliable choice for replacing a worn-out bottom bracket or completing a new Hollowtech II drivetrain setup. It offers:

• Simple installation

• Standard BSA compatibility

• Excellent value for money

• Proven Shimano reliability

Conclusion

The Shimano BB-RS501 Hollowtech II bottom bracket is an ideal solution for riders looking to restore smooth and efficient drivetrain performance on a 68 mm threaded BSA frame. Despite its opened and slightly dirty packaging, the product itself is brand new and fully functional, delivering the trusted quality of Shimano.