The SRAM DUB (Durable Unified Bottom Bracket) bottom bracket series has a simple job - connect your crankarms and protect the smooth, long-lasting application of power to your drivetrain.

To allow that singular focus, SRAM has engineered the DUB spindle to be the one true unifying component. One oversized spindle to work across every bottom bracket standard. For better crankarm compatibility. For better protection from the elements. For longer-lasting performance. To be stronger, smoother, simpler. Now, back to the ride.

Compatibility

68 / 73mm - English - Version for BSA threaded bb shells and 68/73 mm bb width

68 / 100mm - English - Version for BSA threaded bb shells and 100 mm bb width (Fatbike)

BB92 / 92mm - PressFit - Version for PressFit (PF41) bb shells and 89.5/92 mm bb width 

121mm - PressFit - Version for PressFit (PF41) bb shells and 121 mm bb width (Fatbike)

73mm - BB30 - Version for BB30 (BB42) bb shells and 73 mm bb width

73mm - PF30 - Version for Pressfit 30 (PF46) bb shells and 73 mm bb width

Features

One oversized spindle to work across every bottom bracket standard

Sealed cartridge bearings

Gutter Seal Technology drastically improves sealing against the elements

Significantly lighter than GXP system

DUB is no new bottom bracket shell standard

Specifications

68 / 73mm - English

Material: cups: aluminium

Weight: approx. 76g (manufacturer information)

BSA/ITA: BSA

Bottom bracket spindle profile: DUB (28.99 mm hollow spindle)

Case width: 68/73mm

68 / 100mm - English

Material: cups: aluminium

Weight: approx. 76 gram (73mm version, manufacturer information)

BSA/ITA: BSA

Bottom bracket spindle profile: DUB (28.99 mm hollow spindle)

Case width: 100mm

BB92 / 92mm - PressFit 

Material: cups: steel

Weight: 71g (manufacturer information)

Bottom bracket spindle profile: DUB (28.99 mm hollow spindle)

Case width: 89.5/92mm

Case diameter: 41mm

121mm - PressFit 

Material: cups: steel

Weight: approx. 71 gram (92mm version, manufacturer information)

Bottom bracket spindle profile: DUB (28.99 mm hollow spindle)

Case width: 121mm

Case diameter: 41mm

73mm - BB30

Material: cups: aluminium

Weight: approx. 82g (manufacturer information)

Bottom bracket spindle profile: DUB (28.99 mm hollow spindle)

Case width: 73mm

Case diameter: 42mm

73mm - PF30

Material: Cups: Aluminium

Weight: 89 gram (manufacturer information)

Bottom bracket spindle profile: DUB (28.99mm hollow spindle)

Case width: 68-92mm

Case diameter: 46mm

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