Rotor BSA30 Bottom Bracket

The rotor BSA30 bottom bracket with external bearing cups allows the installation of 3D + (RR and MTB) cranksets in frame with oversize bottom bracket BSA

- 30mm external bearings BB which allows the installation of 3D+ cranks in BSA threaded frames
- Silicone seals give buttery-smooth spinning with unparalleled protection against dust, water and mud
- Elegant new cup design offers a sleek, modern look, combining striking angles with smooth curves
- The bearings are not compatible with BB90 or BB89 frame.