For sale is an good condition Shimano Ultegra BB-6500 Octalink threaded bottom bracket - BSA English threads. OCTALINK type interface. 1.37 x 24 BSA English Threaded.
Shimano BB-ES300 Octalink Bottom Bracket - 68mm
Shimano BB-ES300 Octalink BSA Bottom Bracket Various Sizes
SHIMANO BB-ES51 Octalink V2 Bottom Bracket (68x113-mm)
Shimano BB-ES300 Octalink Bottom Bracket - All Sizes 68 & 73mm
Shimano BB-ES300 Octalink Bottom Bracket - 68 x 121mm
Shimano Deore Alivio Octalink V2 Bottom Bracket ES-300 73 x 126
