Ceramic Speed

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

The CeramicSpeed BB ALPHA Mountain Bottom Bracket is built for riders who demand maximum efficiency and durability from every pedal stroke. Designed for T47 mountain frames with a 73mm shell and SRAM DUB spindles, this bottom bracket combines precision engineering with low-friction performance to keep you riding smoother and faster for longer.

Hand-built in Denmark, the BB ALPHA uses hardened stainless-steel races paired with grade-3 Silicon Nitride ceramic balls for exceptional corrosion resistance and reduced rolling resistance. The redesigned bearing placement and stiff POM dust covers improve protection against dirt and moisture—ideal for demanding off-road conditions. With custom seals and 7075 aluminum cups, it offers a 10% weight reduction and simplified installation compared to previous generations.

• Optimized for T47 73mm mountain frames with SRAM DUB spindles
• Hand-built ceramic bearings deliver ultra-low friction and long-lasting performance
• Hardened stainless-steel races resist corrosion and extend bearing life
• Custom light-contact seals and precision dust covers enhance moisture and debris protection
• Redesigned bearing support improves load handling and pre-load stability
• Lightweight 7075 aluminum cups and simplified spacer tube reduce weight and ease installation
• Backed by a lifetime warranty for complete confidence on every ride

For riders focused on efficiency, longevity, and reliability in all conditions, the CeramicSpeed BB ALPHA Mountain Bottom Bracket sets a new benchmark in bottom bracket performance.