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ROTOR UBB4630 PF30 BB Steel. You, or more specifically, your choice of frame, motivated us to address challenges related to bottom bracket installation and durability – thank you. We embraced the task to improve upon so-called bottom bracket standards to give you the UBB4630. 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. 

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ROTOR UBB4630 PF30 BB Steel features:

 Weight  109g 
 Material  100% CNC-machined, 7075 aluminum. Labyrinth seals prevent bearing contamination
 Compatible Crankset Brand  ROTOR
 Material Bearing  Steel
 Axle diameter compatible  30mm
 Frame Type  PF30
 Discipline   Road | Triathlon | Gravel | Cyclocross 
Compatible Crankset Brand
Material Bearings
Shell Widht
68mm, 73mm
Frame Type
Cyclocross, Gravel, Road, Triathlon
Main Category
Bottom Brackets (ID:89)
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