Shimano Tiagra RS500 Bottom Bracket 1.37 x 24 English Hollowtech II

Shimano Tiagra RS500 Bottom Bracket 68mm English Thread Strong and smooth, the Shimano Tiagra RS500 Bottom Bracket is for use with 2-piece cap-free design road chainsets. Features: Minimal bearing interface gives superbly smooth rolling Easy installation Weight 92g ( approx )