Ceramic Speed

BB ALPHA Mountain Bottom Bracket - T47, 73mm, For 30mm Spindle

The CeramicSpeed BB ALPHA Mountain Bottom Bracket is built for riders who demand efficiency, durability, and long-term performance on every ride. Designed for T47 frames with a 73mm shell and a 30mm spindle, this bottom bracket sets a new benchmark for smooth, low-friction performance and exceptional protection against the elements.

At the core of the BB ALPHA are hardened stainless steel races paired with hand-built, grade-3 Silicon Nitride ceramic balls for an ultra-smooth spin and outstanding corrosion resistance. Custom-engineered seals and precision-fit dust covers provide up to five times the moisture protection of previous designs, keeping the bearings running clean and fast in any conditions. The lighter 7075 aluminum cups and simplified spacer tube design make installation straightforward while trimming weight by 10% compared to earlier models.

Every CeramicSpeed BB ALPHA is hand-built in Denmark and backed by a lifetime warranty, ensuring performance that lasts as long as your frame.

• Exceptional durability: Hardened stainless steel races resist corrosion and wear for long-term reliability.
• Ultra-smooth performance: Grade-3 Silicon Nitride ceramic bearings deliver low-friction efficiency for maximum power transfer.
• Enhanced protection: Redesigned seals and dust covers block debris and moisture for up to 500% better sealing performance.
• Lightweight construction: 7075 aluminum cups and simplified spacer tube reduce overall weight by 10%.
• Precision fit: Bearing placement and internal race design improve stiffness and pre-load handling.