Ideal for a road-bike owner replacing a worn bottom bracket on a 79 mm PF30 frame using SRAM DUB road cranks.
The SRAM DUB PF30 79-A Road Bottom Bracket is designed for road bikes with a PF30 frame shell, a 79 mm shell width and a 46 mm inner diameter. It connects a compatible DUB road crankset to the frame using press-fit cups, making it the right replacement or upgrade when those frame dimensions and interfaces match.
The DUB system uses one oversized spindle across bottom bracket specifications, helping simplify crankarm compatibility while providing a stiff, durable drivetrain interface. For day-to-day reliability, the bottom bracket uses sealed cartridge bearings to help protect the bearing surfaces from contamination.
The aluminium press-fit cups keep the assembly weight-focused, while the available standard or ceramic bearing options let you choose the specification that suits your bike and budget. Check your frame shell measurements and crankset interface before ordering; this is a road-specific PF30 79-A version, not a universal bottom bracket.
Road-specific PF30 fit
Made for road frames with a PF30 interface, 79 mm shell width and 46 mm inner diameter.
SRAM DUB spindle interface
Matches SRAM DUB road cranksets and uses the oversized DUB spindle system.
Press-fit installation
The cups press directly into the frame, providing a clean and straightforward bottom bracket assembly.
Sealed cartridge bearings
Sealed bearings help protect the rotating interface from dirt and moisture during regular riding.
Aluminium cups
Aluminium construction keeps the press-fit cups light while providing a durable housing.
Bearing choice
Available with standard or ceramic sealed cartridge bearings to suit your preferred specification.
Multiple chainline options
Published chainline options span 45.0 mm, 47.5 mm, 49.0 mm, 51.0 mm, 52.0 mm, 55.0 mm, 56.5 mm, 66.5 mm and 76.5 mm.
General
Compatibility
Materials and construction
Features
DUB
The DUB system integrates the crank, chainring, spindle and bottom bracket so you get a stiff, durable and straightforward drivetrain interface. Its oversized spindle is designed to improve crankarm compatibility and protection from the elements.
PressFit
PressFit cups install directly into the frame, reducing installation complexity and helping keep the bottom bracket assembly light.
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.
