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Super round CeramicSpeed balls and hardened-steel races. It has the design benefits of being oversized and wide, but also the practical benefits of threads. T47 bottom brackets utilize the oversized interface of PF30 and EVO386, but with the added benefit of a threaded interface.

Super round CeramicSpeed balls and hardened-steel races. It has the design benefits of being oversized and wide, but also the practical benefits of threads. T47 bottom brackets utilize the oversized interface of PF30 and EVO386, but with the added benefit of a threaded interface.