Rotor BB4224

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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 PF4124 bottom brackets are desi gned to work with non-tapered 24mm spindled cranks and 42mm inner diameter bottom brackets. 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 PF4124 bottom brackets are designed to work with non-tapered 24mm spindled cranks and 42mm inner diameter bottom brackets. Allows use of 24mm cranks on BB30 frames T6 heat treated 7075 Aluminum cups Show more