New Shimano BB-RS500 BSA, 24mm Bottom Bracket 

This Shimano BB-RS500 Hollowtech II Bottom Bracket is reliable and smooth to help keep your drivetrain running fast and efficient.

Specifications:
Frame Interface: BSA/English Threaded
Spindle Interface: 24mm (Shimano Hollowtech II, FSA MegaExo, Surly OD, FSA MegaExo Light, RaceFace EXI)
Shell Width: 68mm
Color: Silver