Rotor Bottom Bracket 30 mm
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BB30 to BB24 Converter
The UBB is simple: It fits everything. For BB30 frames, this means you can install 30mm. axle with Press Fit 4630 and the 24 mm. crank with the PRESS FIT 4624.
The UBB is a concept that encompasses and works with ALL BB standards, forever eliminating complicated BB/Crank compatibility problems. There is always a UBB crank to fit your bike irrespective of its BB type. What’s more, there is almost always an unexpected UBB30 upgrade solution for non 30mm frames!
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