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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 designed to work with non-tapered 24mm spindled cranks and 41mm pressfit 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 41mm pressfit inner diameter bottom brackets.
• Classic press fit bearing for all Rotor and other 24mm cranks
• Compatible with BB86 (Road) and BB 89/92 (MTB)
• Lathed, heat-treated hi grade steel cups
• Lip seals reduce rolling resistance