The Rotor Bearings Set BB30 has been designed to eliminate complicated bottom bracket/crank compatibility often found with today's bottom brackets. Utilizing the BB30 system, Rotor has conceived a universal bottom bracket (UBB) concept to eliminate complicated bottom bracket compatibility challenges that continue to frustrate your local bike mechanics to this day.
I needed a cost effective replacement bearing for my BB30. I have been very pleased with how smooth these are - much better than the FSA bearings that came with the bike. Very quiet as well - not a single creak. I have 500 miles on this set but so far so good.
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