The ROTOR UBB 4630 Bottom Bracket adapts any PF30, BBRight or 386 EVO bottom bracket shell to fit a 30 mm diameter crank spindle. However, what is unique about ROTOR’s UBB, is that it features external bearings and uses a threaded sleeve to lock the bottom bracket cups in place. This offers several advantages over a more traditional press fit bottom bracket. The ROTOR UBB helps provide a uniform, smooth spin to the crankset, it helps eliminate any unwanted noises and creaks; it works to improve bearing life; and the external location of the bearing results in increased shell stiffness.
Works with PF30, BBRight or 386 EVO bottom brackets
Built using 7000 series aluminum alloy
POWER METER SPECIALISTS
We can offer you the best value, selection, advice and support
We promise your satisfaction and offer an easy return policy
Customers get 20% off TrainingPeaks Premium plus other special savings
At Power Meter City, every product we sell comes with a full warranty