Shimano BB-RS501 Hollowtech II English Bottom Bracket - Lightweight Aluminum Code Lock Type_Folding Lock The breathable synthetic construction ensures

The breathable synthetic construction ensures optimal airflow

modern aesthetic that's perfect for riders seeking a stylish

this guide withstands the rigors of outdoor use

offers reliable

Shimano BB-RS501 Hollowtech II English Bottom Bracket - Lightweight Aluminum Code Lock Type_Folding Lock The breathable synthetic construction ensuresThe Shimano BB RS501 bottom bracket features an enhanced seal construction to provide long lasting performance and service life. For use with English thread bottom bracket frames Designed for a perfect fit with Hollowtech II 24mm crank spindles Anodized aluminum cups are high strength and light weight