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CeramicSpeed BB Alpha for BSA 30 mm Bottom Bracket BB Alpha is designed to outlast the frame it is fitted to, offering exceptional durability and long term performance. It features hardened stainless steel races hand built with grade 3 Silicon Nitride ceramic balls, combined with custom engineered seals and precision dust covers. This construction... moreprovides up to 500 percent better moisture protection while maintaining ultra low friction. The simplified spacer tube design and lighter cups allow quick installation and deliver a 10 percent weight saving compared with previous versions. Every CeramicSpeed BB Alpha model is supported by a lifetime warranty. CeramicSpeed Ultra Durable Construction The combination of ceramic bearings, advanced sealing and robust materials ensures smooth, reliable rotation in all conditions. The system is engineered to minimise contamination and maximise longevity, making it suitable for demanding riders who expect consistent performance. CeramicSpeed Precise Fit Compatibility Precisely pair a crankset with a 30 mm axle of adequate length with a BSA or English threaded frame by selecting this high quality bottom bracket from CeramicSpeed.