The ROTOR UBB Bottom Brackets for Road and MTB The ROTOR UBB uses a threaded bushing to lock both cups in place – without all the locking force resting on the press fit, providing uniform rotation and avoiding unwanted noise. The flat fit in the press fit area prevents bearing overload and also improves bearing alignment for longer life. The external bearing location ensures smoother rotation and increased rigidity of the BB shell for PF30 and BBright standards. The internal sleeve also prevents cable guides from rubbing along rotating parts. CHARACTERISTICS Available Types: UBB 4630 PF30 Steel, UBB 4630 PF30 Ceramic, UBB 4630 386 Steel, UBB 4630 386 Ceramic, UBB 4630 BBRIGHT Steel, UBB 4630 BBRIGHT Ceramic, UBB 4629 PF30 DUB Steel Discipline: Road, MTB, Triathlon, Gravel, Cyclocross ROTOR PART NUMBERS C04-028-01010-0 C04-028-03010-1 C04-029-01010-0 C04-029-03010-1 C04-027-01010-0 C04-027-03010-1
