Bottom bracket SRAM DUB MTB Press-Fit 30 83mm

SRAM DUB bottom brackets are designed to connect the crank arms and provide smooth, long-lasting power transfer through the drivetrain. The DUB axle is designed as a single unifying component: one axle size fits all bottom bracket specifications. This improves crank compatibility and protection from the elements, while extending service life. The design is intended to be stronger, smoother, and simpler.

One oversized axle fits all bottom bracket specifications.

Easy to install.

PressFit cups help reduce weight.

Sealed cartridge bearings are available in stainless steel or ceramic versions.

Technical specifications

• Bottom bracket-to-frame interface (selectable as an option, if available): BB386, BB386 (Road: 86.5mm), PF30, PF30 (100mm), PF30 (68), PF30 (68-73mm), PF30 (68 or 73mm or BB Right), PF30 (73mm), PF30 (79-83mm or BB Right), PF30 (83mm), PF30 (MTB Ai: 83-A mm), PF30 (Road Ai: 83-A mm), PF30 (Road BB Right: 79/83mm), PF30 (Road: 73mm)
• Crank-to-bottom bracket interface: DUB
• Bearing type: ceramic, standard
• Axle diameter: DUB
• Axle length: 55.0mm
• Cup material: aluminum

Technology

DUB technology is based on the relationship between the bottom bracket axle and bearings, balancing stiffness and durability. The design has been simplified to improve integration between the chainring, crank arms, axle, and bottom bracket. This approach to creating a complete system helps improve drivetrain performance.