SRAM DUB BSA bottom bracket threads into standard English (BSA) threaded frames — the most common bottom bracket shell in road and MTB frames. It adapts the DUB 28.99mm spindle standard to threaded frames and is available in 68mm and 73mm shell widths, covering the full range of road and MTB threaded applications.

Highlights

  • DUB threaded bottom bracket for BSA English-threaded frames
  • Fits 68mm (road) and 73mm (MTB) shell widths
  • 28.99mm DUB spindle compatibility — full SRAM crankset range
  • Right-hand thread on drive side, left-hand thread on non-drive side (standard BSA)
  • Serviceable cup and bearing design

DUB and threaded frames

Threaded bottom brackets are the simplest, most serviceable option available — they thread in, can be replaced without a bearing press, and stay put under load. SRAM's DUB BSA brings the DUB spindle standard to threaded frames, covering the majority of road and MTB bike builds on the market.

Fit and compatibility

Fits standard BSA English-threaded bottom bracket shells (1.37" × 24tpi). Right-hand drive-side thread. Compatible with SRAM DUB cranksets only. Confirm shell width — 68mm for most road frames, 73mm for MTB. Not compatible with Italian-threaded or press-fit shells.

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

Visit product service page
Features
  • One oversized spindle to work across every bottom bracket specification
  • Gutter Seal Technology™ seals against the elements
  • Significantly lighter than GXP® system
  • Sealed cartridge bearings available in both stainless and ceramic versions

Specifications

BB-frame interface BSA, English/BSA (MTB Ai: 73mm), English/BSA (MTB/Road: 68/73mm), English/BSA 100mm, English/BSA 68/73mm, English/BSA 68mm, English/BSA 73mm, English/BSA 83-A, English/BSA 83mm
Chainline 55.0mm, 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-BSA-A1
Model # BB-DUB-BSA-A1
Barcode # BB-DUB-BSA-A1
Brand SRAM