Ceramic Speed

BB ALPHA Mountain Bottom Bracket - BB92, 89.5/92mm, For SRAM DUB Spindle

CeramicSpeed BB ALPHA Mountain Bottom Bracket is built for riders who demand lasting performance and efficiency on every climb and descent. Designed for frames with a BB92 shell and SRAM DUB spindle, this bottom bracket delivers exceptional durability, low friction, and precision fit—all in a lightweight, easy-to-install package.

At the core are hand-built bearings featuring grade-3 Silicon Nitride ceramic balls rolling on hardened stainless-steel races. This combination reduces friction, improves corrosion resistance, and extends bearing life well beyond standard bottom brackets. The redesigned internal race and stiffer dust covers provide added support and protection against debris, while custom-engineered seals balance smooth rotation with long-term reliability.

A simplified spacer tube and 7075 aluminum cups make installation straightforward and cut weight by 10 percent compared to previous generations. Built and assembled in Denmark, the BB ALPHA is made to perform flawlessly through season after season of demanding mountain riding.

• Ultra-low friction performance from hand-built ceramic bearings with grade-3 Silicon Nitride balls
• Exceptional protection with custom seals and stainless-steel races for long-term durability
• Improved bearing placement and stiff POM dust covers keep debris out and performance consistent
• Lightweight 7075 aluminum cups reduce overall weight and simplify installation
• Lifetime durability designed to outlast the frame it’s installed in