C-Bear ceramic bearings are manufactured with incredible precision, delivering an almost lossless power transfer to your drivetrain. This Pressfit BB86/BB92 bottom bracket fits all 30mm Rotor cranksets, as well as FSA Evo 386/392 and THM systems.   The precision CNC aluminium cups provide the perfect housing for the ceramic bearings, creating a system that exudes quality. If your bike features a compatible 41mm diameter pressfit bottom bracket shell, you can treat your drivetrain to this upgrade and maximise your performance on the bike. C-Bear PF21 Cer BB86/92 Bottom Bracket Features Rotor: 3D+, 3DF, Rex1, Rex2 FSA EVO 386 FSA EVO 392 (MTB) THM Clavicula Campagnolo Over Torque Sram Quarq DZero