UBB PF30 (4630) Threaded Bottom Brackets

Crafted from 7000 series aluminum alloy, the UBB4630 uses a threaded sleeve to lock both cups in place, without having all the locking effort rely on the press fit shell, thus providing a uniform spin and avoiding undesired noises.   The flush fitting in the press fit region prevents bearing overload and also improves bearing alignment for a longer bearing life. The external bearing location affords a smoother spin and increased BB shell stiffness for PF30 and BBright standards. The internal sleeve also prevents cable guides from rubbing against rotating parts.  Characteristics: Steel 109g Compatibility: BBright Model - only if crank does not have an integrated spacer on the spider  BB386 - all PFBB386EVO bikes PressFit30 - only for ROTOR extended axle cranks (all 30mm) on PF30 frames Requires special installation tools