Rotor has bolstered its Universal Bottom Bracket (UBB) line up with a new UBB4360 design that uses a threaded sleeve 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.