Fit a SRAM DUB (28.99 mm) crank in a Specialized OSBB shell
Whether a SRAM DUB (28.99 mm) crank fits a Specialized OSBB shell, and the bottom bracket that makes it work.
The crank and the shell
| Crank spindle | SRAM DUB (28.99 mm) (28.99 mm constant diameter) |
|---|---|
| Frame shell | Specialized OSBB (42 mm bore (alloy, BB30 style) or 46 mm bore (carbon, PF30 style), 68 mm (road) and 73 mm (MTB) wide) |
| Verdict | needs a reducer |
| Bottom bracket to buy | OSBB DUB bottom bracket |
SHELL Specialized OSBB (42 mm bore (alloy, BB30 style) or 46 mm bore (carbon, PF30 style), 68 mm (road) and 73 mm (MTB) wide)
SPINDLE SRAM DUB (28.99 mm) (28.99 mm constant diameter)
BB OSBB DUB bottom bracket
SPINDLE SRAM DUB (28.99 mm) (28.99 mm constant diameter)
BB OSBB DUB bottom bracket
A SRAM DUB 28.99 mm crank runs in a Specialized OSBB shell using a DUB press-fit unit sized for the 46 mm carbon or 42 mm alloy bore. The 28.99 mm axle needs the DUB-specific unit.
A 30 mm OSBB BB will not hold a DUB axle. Confirm both the bore and that the unit is the DUB version before buying.
The bottom bracket to buy
Search Amazon for OSBB DUB bottom bracketaffiliate searchFind OSBB DUB bottom bracket on eBayaffiliate
Related fits
SRAM DUB (28.99 mm)28.99 mm spindleSpecialized OSBB42 or 46 mm boreSRAM DUB (28.99 mm) in a BSA / English threaded shelldrops inSRAM DUB (28.99 mm) in a T47 internal (T47-85.5 / T47-86 / T47-92) shelldrops inSRAM DUB (28.99 mm) in a PF30 press fit shellneeds a reducerSRAM DUB (28.99 mm) in a BB86 press fit (road) shelldrops in
SOURCES: Pinkbike, SRAM's New DUB Cranks and Bottom Brackets · Wheels Manufacturing, Crankset Spindle Standards & BB Compatibility · Hambini Engineering, Specialized OSBB Engineering Guide · Kogel Bearings, Specialized OSBB explained