Sram:

The new SRAM DUB 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, we’ve 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.

FEATURES
One oversized spindle to work across every bottom bracket standard
Greater bearing durability
ISO 4210 compliant. See Declaration of Conformity for details.

SPECS

B-frame interfaceBB30
BB30 (Road Wide: 68mm), BB30 (Road Wide: 73mm), BB30 (Road: 73mm), BB30 83-A
Crank-BB interface
DUB
Bearing type
Ceramic, Standard
Spindle diameter
DUB
Spindle length
n/a
Chainline
n/a
Support E-type FD
n/a
Cup material
Aluminum