Fit a 30 mm spindle (BB30 / PF30 style) crank in a BB30A press fit (Cannondale) shell
Whether a 30 mm spindle (BB30 / PF30 style) crank fits a BB30A press fit (Cannondale) shell, and the bottom bracket that makes it work.
The crank and the shell
| Crank spindle | 30 mm spindle (BB30 / PF30 style) (30 mm constant diameter) |
|---|---|
| Frame shell | BB30A press fit (Cannondale) (42 mm smooth press-fit bore, 73 mm (asymmetric, 5 mm wider on the non-drive side) wide) |
| Verdict | drops in |
| Bottom bracket to buy | BB30A bearings for a 30 mm spindle |
SHELL BB30A press fit (Cannondale) (42 mm smooth press-fit bore, 73 mm (asymmetric, 5 mm wider on the non-drive side) wide)
SPINDLE 30 mm spindle (BB30 / PF30 style) (30 mm constant diameter)
BB BB30A bearings for a 30 mm spindle
SPINDLE 30 mm spindle (BB30 / PF30 style) (30 mm constant diameter)
BB BB30A bearings for a 30 mm spindle
A 30 mm Cannondale SI crank is the native fit for a BB30A shell. Bearings press into the 42 mm bore and the 30 mm axle runs on them across the 73 mm asymmetric shell.
A symmetric BB30 crank spindle is too short for the 5 mm-wider BB30A shell. Use a Cannondale BB30A-length crank, and check circlips are fully seated.
The bottom bracket to buy
Search Amazon for BB30A bearings for a 30 mm spindleaffiliate searchFind BB30A bearings for a 30 mm spindle on eBayaffiliate
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SOURCES: Wheels Manufacturing, Three Common Bottom Bracket Misconceptions · Wheels Manufacturing, Crankset Spindle Standards & BB Compatibility · Wheels Manufacturing, Cannondale BB30a & PF30a Bottom Bracket Guide · Kogel Bearings, Cannondale BB30A and PF30A explained