Rotor Universal Bottom Brackets are designed to provide an easy yes to the question – is this bottom bracket compatible with my frame and crank? UBB PF4130 bottom brackets are designed to work with 30mm spindled cranks and 41mm pressfit inner diameter bottom brackets.Press fit bearings for 41mm shells such as BB86, BB89 and BB92Item SpecificationsBB/Frame InterfaceBB86Spindle Interface TypeRotor 3D+BB Shell Width86Defined ColorBlackBottom Bracket Shell I.D.41