Rotor bb30 ceramic bottom bracket kitoriginal bb30 bearings without press fit cups for 42mm diameter bb30 frames features for all bb30 and bbright direct fit frames compatible with 30mm axle cranks from rotor and other brands compatible with bb30 road frames 68mm and mtb frames 68mm or 73mm contains rotor labyrinth secondary seals and retaining spring clipsbuyrotor componentsfrom chain reaction cycles the worlds largest online bike store