Ceramic Speed

BB ALPHA Gravel Bottom Bracket - T47, 86mm, For SRAM DUB Spindle

The CeramicSpeed BB ALPHA Gravel Bottom Bracket is built for riders who demand smooth performance and unmatched durability on every ride. Designed for T47, 86mm shells and SRAM DUB spindles, this bottom bracket combines precision engineering with advanced materials to deliver long-lasting, low-friction performance in the toughest conditions.

Each BB ALPHA is hand-built with hardened stainless steel races and grade-3 Silicon Nitride ceramic bearings for exceptional efficiency and corrosion resistance. The updated design moves the bearings further out in the cup, improving stiffness and durability while enhancing protection against dirt and moisture. Custom light-contact seals and precision-fit dust covers create a balance between efficiency and protection that keeps the drivetrain spinning freely through mud, grit, and rain.

The simplified spacer tube and lightweight 7075 aluminum cups make installation straightforward and reduce overall weight by 10% compared to previous versions. Like all CeramicSpeed bottom brackets, the BB ALPHA is made by hand in Denmark and built to last a lifetime.

• Ultra-low friction performance from grade-3 Silicon Nitride ceramic bearings
• Improved sealing system with stainless-backed light-contact seals for up to 500% better moisture protection
• Hardened stainless steel races for superior corrosion resistance and bearing longevity
• Redesigned bearing placement for greater stiffness and debris protection
• Lighter 7075 aluminum cups and simplified installation
• Hand-built in Denmark and backed by a lifetime warranty