SRAM DUB BB30 adapts the DUB 28.99mm spindle to BB30 and PF30 frames — the 42mm inner diameter shell used by many performance road, gravel, and MTB frames. This bottom bracket fits where a traditional BB30 bearing would sit, bringing full DUB crankset compatibility without requiring a different frame shell standard.

Highlights

  • DUB bottom bracket for BB30 and PF30 frames — 42mm inner diameter
  • 68mm shell width
  • 28.99mm DUB spindle — full SRAM DUB crankset range
  • Snap-ring retention in BB30 frames, press-fit in PF30 frames
  • Serviceable bearing design

Fit and compatibility

Fits BB30 shells (snap-ring retention, 42mm ID) and PF30 shells (press-fit, 46mm OD shell bore). Compatible with SRAM DUB cranksets only. Confirm frame shell type — BB30 and PF30 share the 42mm bearing outer diameter but differ in how they're retained. Professional installation recommended.

Installation. Service. Compatibility. Find all the documentation needed to set up, use, and maintain your components in the SRAM Service hub.

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Features
  • One oversized spindle to work across every bottom bracket specification
  • Sealed cartridge bearings available in both stainless and ceramic versions

Specifications

BB-frame interface BB30, BB30 (Road Wide: 68mm), BB30 (Road Wide: 73mm), BB30 (Road: 73mm), BB30 83-A
Chainline n/a
Spindle length n/a
Support E-type FD n/a
Crank-BB interface DUB
Bearing type Ceramic, Standard
Spindle diameter DUB
Cup material Aluminum
SKU SRM-BB-DUB-BB30-A1
Model # BB-DUB-BB30-A1
Barcode # BB-DUB-BB30-A1
Brand SRAM