Shimano RS500 Tiagra Enlgish Bottom Bracket nopoints The race-ratchet closure means you

The race-ratchet closure means you can make on-the-fly adjustments to get the fit just the way you like it

and together with our latest technology DualPitch substantially reducing vibrations

Featuring a patented dual-stage lock that’s quick and easy to attach / detach

the upgraded E4 caliper incorporates hybrid-style stainless steel pistons augmented with phenolic inserts

for a tailored fit and enhanced cooling

Shimano RS500 Tiagra Enlgish Bottom Bracket nopoints The race-ratchet closure means youSHIMANO TIAGRA Bottom Bracket Threaded HOLLOWTECH II 68 70 mm shell width. The SHIMANO TIAGRA bottom bracket uses a new seal construction for long lasting performance.