5/3/4/5/6mm hex bits

Designed and made in the USA

quality components like a 1x drivetrain* with a clutch-equipped rear derailleur

Since the introduction of our line of Service Course SL components we’ve had amazing success with our pro level athletes in all disciplines

Just go: Apex 1 will get you there

SHIMANO Tiagra RS501 Bottom Bracket - English Threaded 68mm Orange Seal 5/3/4/5/6mm hex bitsThe 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 For use with English thread bottom bracket frames