A Specialized Shiv (OSBB era) frame uses a Specialized OSBB bottom bracket shell (42 or 46 mm bore). The dimensions, which cranks fit, and the exact bottom bracket to buy.
Updated 05 September 2026.
What bottom bracket does a Specialized Shiv (OSBB era) use?
The bottom bracket shell standard on a Specialized Shiv (OSBB era), and how to pick the right BB.
| Frame | Specialized Shiv (OSBB era) |
|---|---|
| Shell standard | Specialized OSBB (42 or 46 mm bore) |
| Shell inside diameter | 42 mm bore (alloy, BB30 style) or 46 mm bore (carbon, PF30 style) |
| Shell width | 68 mm (road) and 73 mm (MTB) |
SPINDLE see table
The Specialized Shiv (OSBB era) uses a Specialized OSBB bottom bracket shell (42 or 46 mm bore), a 42 mm bore (alloy, BB30 style) or 46 mm bore (carbon, PF30 style), 68 mm (road) and 73 mm (MTB) wide.
It is a press-fit shell, so bearings or cups press into the 42 mm bore (alloy, BB30 style) or 46 mm bore (carbon, PF30 style). Match the shell width as well as the bore, because a shorter unit will not preload the crank across a wider shell.
SOURCES: Hambini Engineering, Specialized OSBB Engineering Guide · Kogel Bearings, Specialized OSBB explained
Questions and answers
What bottom bracket does a Specialized Shiv (OSBB era) use?
A Specialized Shiv (OSBB era) frame uses a Specialized OSBB bottom bracket shell (42 or 46 mm bore).