UBB 4630 Ceramic Bottom Bracket

You've grown weary of creaky press fit bottom brackets, but you don't want to give up that beautiful frameset you've spent so much time perfecting the build on. Rotor's UBB 4630 Ceramic Bottom Bracket is here to save the day with an internal sleeve that allows the sides of the bottom bracket to thread together for perfect alignment and durable creak-free function. This particular piece of componentry also get the top-tier treatment with the addition of silky ceramic bearings that'll turn fast and smooth for many miles to come.

• A bottom bracket for 46mm diameter PressFit shells
• Center sleeve threads together for a solid, creak-free interface
• Silky smooth ceramic bearings for efficient pedal turns
• Silicone seals keep dirt and grime out of the bearings