Fit a Shimano Hollowtech II (24 mm) crank in a PF30A press fit (Cannondale Ai) shell
Whether a Shimano Hollowtech II (24 mm) crank fits a PF30A press fit (Cannondale Ai) shell, and the bottom bracket that makes it work.
The crank and the shell
| Crank spindle | Shimano Hollowtech II (24 mm) (24 mm constant diameter) |
|---|---|
| Frame shell | PF30A press fit (Cannondale Ai) (46 mm smooth press-fit bore, 73 mm (asymmetric, for Cannondale Ai offset rear) wide) |
| Verdict | needs a reducer |
| Bottom bracket to buy | PF30A to 24 mm Shimano reducer bottom bracket |
SHELL PF30A press fit (Cannondale Ai) (46 mm smooth press-fit bore, 73 mm (asymmetric, for Cannondale Ai offset rear) wide)
SPINDLE Shimano Hollowtech II (24 mm) (24 mm constant diameter)
BB PF30A to 24 mm Shimano reducer bottom bracket
SPINDLE Shimano Hollowtech II (24 mm) (24 mm constant diameter)
BB PF30A to 24 mm Shimano reducer bottom bracket
A 24 mm Shimano crank runs in a Cannondale PF30A 46 mm bore using a reducer BB that presses into the 73 mm shell and steps down to 24 mm.
Because PF30A is an Ai offset frame, confirm the crank and chainring suit the shifted chainline, not just that the reducer fits the bore.
The bottom bracket to buy
Search Amazon for PF30A to 24 mm Shimano reducer bottom bracketaffiliate searchFind PF30A to 24 mm Shimano reducer bottom bracket on eBayaffiliate
Related fits
Shimano Hollowtech II (24 mm)24 mm spindlePF30A press fit (Cannondale Ai)46 mm bore, 73 mm asymmetricShimano Hollowtech II (24 mm) in a BSA / English threaded shelldrops inShimano Hollowtech II (24 mm) in a Italian threaded shelldrops inShimano Hollowtech II (24 mm) in a T47 external (T47-68 / T47-73) shelldrops inShimano Hollowtech II (24 mm) in a PF30 press fit shellneeds a reducer
SOURCES: Park Tool, Bottom Bracket Standards and Terminology · Wheels Manufacturing, Crankset Spindle Standards & BB Compatibility · BikeRadar, The complete guide to bottom bracket standards · Wheels Manufacturing, Three Common Bottom Bracket Misconceptions