CeramicSpeed BB ALPHA BB92 (Sram DUB Road)

The CeramicSpeed BB ALPHA for BB92 SRAM DUB MTB is designed specifically for BB92 press-fit frames (41mm bore, 92mm width) paired with SRAM DUB 28.99mm axle mountain bike cranksets. Built to thrive in mud, moisture, and high-impact off-road environments, it delivers consistently smooth, efficient power transfer ride after ride.

At the core of BB ALPHA is a completely re-engineered bearing system featuring hardened stainless steel races, hand-built in Denmark with Grade 3 Silicon Nitride ceramic balls. This construction preserves CeramicSpeed’s signature ultra-low friction while dramatically improving corrosion resistance and long-term durability.

Custom-engineered low-contact seals and high-stiffness POM dust covers increase moisture and contamination protection by up to 500% compared to previous generations—making BB ALPHA ideal for trail, enduro, and aggressive all-mountain riding.

The bottom bracket cups are machined from 7075 aluminum alloy, offering higher strength with reduced material mass for a 10% weight reduction, while simplifying installation for DUB crank systems by reducing spacer requirements.

Tested over 1,000,000 km in both laboratory and real-world conditions, and backed by CeramicSpeed’s lifetime warranty, BB ALPHA is truly the last bottom bracket you’ll ever need.

FEATURES

Optimized for SRAM DUB MTB cranksets

Designed specifically for 28.99mm DUB axles for precise fit and easy setup

Next-generation BB ALPHA design

Improved durability, sealing, and user experience across the entire range

Hardened stainless steel bearing races

Superior corrosion resistance and improved preload handling

Grade 3 ceramic bearings

Ultra-low friction, long-lasting performance under extreme loads

Custom low-contact seals

Maintains CeramicSpeed efficiency while boosting protection by 500%

Advanced POM dust covers

Developed through 28 design iterations to block dirt and water ingress

Stronger & lighter 7075 aluminum cups

Increased stiffness with a 10% overall weight reduction

MTB-specific durability

Designed for trail, enduro, and all-weather riding conditions

Handbuilt in Denmark

Precision assembly with CeramicSpeed’s signature quality

Lifetime Warranty

Full lifetime coverage across the entire BB ALPHA range

SPECIFICATIONS

Discipline: Mountain Bike (MTB)

Bottom Bracket Type: BB92 (PressFit 41mm × 92mm)

Crank Axle Diameter: 28.99 mm (SRAM DUB)

Compatible Crank Brands: SRAM

Bearing Type: CeramicSpeed Grade 3 Ceramic Bearings

Cup Material: CNC-machined 7075 Aluminum

Net Weight: 76 g

Gross Weight: 202 g

SKU: 115551

IN THE BOX

BB ALPHA for BB92 SRAM DUB MTB

UFO Long Life Grease (5 ml)

CeramicSpeed Decal