The 386EVO Threaded Sleeve Steel UBB4630 Bottom Bracket from Rotor was made to improve on PF30, BB386 and BBright standards by increasing durability and ease of installation. Rather than relying on the pressfit shell for alignment the UBB4630's threaded sleeve locks both cups in place, increasing BB shell stiffness. This also ensures a smooth, uniform spin free from the creaks that often plague pressfit bearings while preventing bearing overload. The perfect alignment also means longer bearing life while the sleeve also prevents cable guides rubbing against rotating parts.
- For use with Rotor 3D, Rotor 3D30 and all Rotor Power cranks with a 30mm axle diameter
- Universal Bottom Bracket
- Threaded Sleeve
- Designed to solve problems with PF30, BB386 and BBright Shells