Description: Built for unmatched efficiency and long-lasting performance, the CeramicSpeed PF4630 OSBB Bottom Bracket is designed to fit 30mm spindle cranksets into Specialized OSBB road frames with PF30 shells. Whether you're racing, training, or simply upgrading your ride, this bottom bracket delivers smoother spinning, reduced drag, and increased power transfer thanks to CeramicSpeed’s industry-leading ceramic bearing technology. Precision-engineered and hand-assembled in Denmark, the PF4630 OSBB is the performance upgrade your bike deserves. Key Features: Compatibility: Fits Specialized OSBB road frames with PF30 shells (46mm ID) and cranksets with 30mm spindles High-Performance Bearings: Features CeramicSpeed’s ultra-smooth, low-friction ceramic bearings for superior efficiency Low Friction & High Durability: Up to 75% less friction and 3–5x longer bearing life compared to standard bottom brackets Lightweight & Strong: Built with premium materials to keep weight down while maximizing performance Handmade Quality: Assembled by hand in Denmark for precision and reliability Includes: Bottom bracket cups, spacers, and CeramicSpeed All Round Grease (for balanced performance and durability)
