SHIMANO Tiagra BB RS500 4700 LEVER Axis Bottom Bracket 68/73mm english Thread or press fit in BB|bottom bracket bsa|bottom bracketbsa bottom bracket - AliExpress
Bottom bracket "" mm (Ref 745) at € 0.00
The New Mid Compact 52-36 Shimano Tiagra 4700 Crankset - YouTube
Shimano Tiagra BB-RS500 Hollowtech II Bottom Bracket 68mmwidth