A good fit for anyone replacing a worn bottom bracket or fitting a SRAM DUB crankset to a BSA-threaded road, MTB, gravel, fat-bike or downhill frame.
The SRAM DUB BSA Bottom Bracket is an English-threaded bottom bracket built for SRAM DUB cranksets. It uses the DUB interface to bring the crankarm, chainring, spindle and bottom bracket together around one common system, making it a practical choice when replacing a worn unit or building a new bike with a DUB drivetrain.
Inside, sealed cartridge bearings support smooth, consistent crank rotation, while the aluminium cups keep the assembly light and durable. Gutter Seal Technology helps limit the entry of water, dirt and other contaminants, making this a sensible choice for riders who expect their bike to see varied weather and regular off-road use.
Compatibility is the key detail: this bottom bracket is for BSA / English-threaded shells and SRAM DUB cranks with a 28.99 mm spindle. It supports a wide range of shell widths, crankset types and chainline configurations, provided the correct spacers are used. For a BSA 68 mm MTB shell, the specified spacer arrangement is important for correct crank spacing and chainline. Installation requires a 12-notch external bottom bracket tool, with the drive-side cup using reverse threading.
DUB crank compatibility
Designed for SRAM DUB cranksets using the 28.99 mm DUB spindle interface.
BSA threaded fit
Fits English-threaded BSA frames rather than press-fit bottom bracket shells.
Broad shell support
Available for BSA 68, 73, 83 and 100 mm shell configurations when matched with the correct spacers and crankset setup.
Sealed cartridge bearings
Helps protect the bearing internals while providing reliable crank rotation for everyday riding.
Gutter Seal Technology
The sealing design helps keep water, dirt and other contaminants away from the bearings.
Aluminium cups
Lightweight aluminium construction keeps the external cups durable without unnecessary bulk.
Wide crankset application
Compatible across DH, fat-bike, MTB, MTB Cannondale Ai, MTB Wide, road, road wide and Super Boost+ crankset configurations, subject to the correct chainline and spacer arrangement.
Straightforward workshop fit
Uses a common 12-notch external bottom bracket interface and installs at 50 N·m when fitted according to the specified procedure.
General
Materials and construction
Compatibility
Dimensions
Features
DUB
The oversized DUB spindle integrates the crankarm, chainring, spindle and bottom bracket around one common interface, helping deliver a stiff, durable and simpler drivetrain system.
Gutter Seal Technology
The sealing design helps keep water, dirt and other contaminants away from the bearings for smoother, longer-lasting performance.
SRAM is an American bicycle component manufacturer founded in Chicago in 1987. The company produces cycling components for road, gravel and mountain bikes, including drivetrains, brakes, suspension, wheels and electronic systems.
SRAM began with Grip Shift gear-change technology and expanded through product development and acquisitions across the cycling component market. Its portfolio includes SRAM, RockShox, Avid, Truvativ, Zipp, Quarq, Hammerhead and other cycling brands.
