A bottom bracket built to outlast your frame. The CeramicSpeed BB ALPHA is custom-engineered to precisely pair a 28.99 mm axle SRAM DUB crankset with a pressfit 46 mm bore frame that is asymmetric and 79 mm wide, commonly referred to as BBright.
BB ALPHA features hardened stainless-steel races hand-built with Grade-3 Silicon Nitride ceramic balls, custom-engineered seals, and precision dust covers—delivering up to 500% better moisture protection while retaining ultra-low friction performance. The simplified spacer tube design and lighter cups ensure quick installation and a 10% weight reduction over previous generations. All CeramicSpeed BB ALPHA models are backed by a lifetime warranty.
Key Features
Lifetime Warranty
Hardened stainless-steel races with Grade-3 ceramic balls
Up to 500% improved moisture and contamination protection
Corrosion resistant by design with ultra-low friction performance
10% weight reduction and simplified spacer tube design
Lightweight, reusable, and fully serviceable construction
Technical Specifications
Brand
CeramicSpeed
Model
BB ALPHA BBright SRAM DUB Road
Part Number (SKU)
115431
BB Standard (BB Type)
BBright (PressFit 46 mm shell ID, 79 mm asymmetric width)
Crank Spindle Diameter
28.99 mm (SRAM DUB)
Crank Brand Compatibility
SRAM
Discipline
Road, Tri, and Track
Net Weight
96.0 g
Gross Weight
225 g
In the Box
CeramicSpeed BB ALPHA for BBright SRAM DUB Road bottom bracket
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