Shimano BB-RS501 Hollowtech II English Bottom Bracket MFPN=4308600 3% Faster than standard tubeless

3% Faster than standard tubeless

These Wolf Tooth Elliptical direct mount rings are designed for SRAM cranks with 8-bolt mounting

Additional mesh pockets

Caliper is fully compatible with flat-mount frames

Synthetic top

Shimano BB-RS501 Hollowtech II English Bottom Bracket MFPN=4308600 3% Faster than standard tubelessThe Shimano BB RS501 bottom bracket features an enhanced seal construction to provide long lasting performance and service life. Designed for a perfect fit with Hollowtech II 24mm crank spindles Anodized aluminum cups are high strength and light weight Bottom Bracket Shell I. D. 1. 37 BB Frame Interface English BB Shell Width (mm) 68 Weight 93 Spindle Interface Type Shimano Hollowtech II Defined Color Silver keyword search RS 500 Interface English