Shimano UN300 Square Taper English Bottom Bracket (Silver) (BSA) (68mm) (122.5mm) ... - EBBUN300B23X
Shimano UN300 Square Taper English Bottom Bracket (Silver) (BSA) (68mm) (122.5mm) ... - EBBUN300B23X, Shimano UN300 Square Taper English Bottom Bracket (Silver) (BSA) (68mm) (122.5mm) (50mm Chainline) - EBBUN300B23X