Rotor UBB4630 Bottom Bracket Features
The UBB4630 bottom bracket is designed to accommodate any PF30, BBRight or 386 EVO standard, to work with a 30mm spindle crankset.- The UBB4630 bottom bracket is designed to accommodate any PF30, BBRight or 386 EVO standard, to work with a 30mm spindle crankset. 
- Double-sealed bearings elevate durability
- Precise steel bearings keep your cranks spinning smoothly
- 30mm spindle interface bridges the gap for bigger axles