PF30A press fit (Cannondale Ai) bottom bracket shell (46 mm bore, 73 mm asymmetric)
What a PF30A press fit (Cannondale Ai) shell measures, which crank spindles it hosts, and the bottom bracket to buy.
Published dimensions
| Type | press fit |
|---|---|
| Shell inside diameter | 46 mm smooth press-fit bore |
| Shell width | 73 mm (asymmetric, for Cannondale Ai offset rear) |
| Thread | none, cups press into the 46 mm bore |
| Crank spindles it hosts | 30 mm native; 24 mm Shimano and 28.99 mm DUB need a reducer |
SHELL 73 mm (asymmetric, for Cannondale Ai offset rear)
SPINDLE 30 mm native; 24 mm Shimano and 28.99 mm DUB need a reducer
SPINDLE 30 mm native; 24 mm Shimano and 28.99 mm DUB need a reducer
Used on: Cannondale frames with the Ai offset rear end.
PF30A is a 73 mm-wide PF30 used on Cannondale Ai frames, whose rear end is offset 6 mm. The chainline is shifted, so a standard PF30 crank is not always a clean swap. Match the crankset to the Ai spec.
Fit a crank to this shell
30 mm spindle (BB30 / PF30 style) in a PF30A press fit (Cannondale Ai) shelldrops inShimano Hollowtech II (24 mm) in a PF30A press fit (Cannondale Ai) shellneeds a reducerPF30 press fitrelated shell (46 mm bore press fit)BB30 press fitrelated shell (42 mm bore press fit)BB386EVO press fitrelated shell (46 mm bore, 86.5 mm)BBRight press fitrelated shell (46 mm bore, 79 mm)
SOURCES: BikeRadar, The complete guide to bottom bracket standards · Wheels Manufacturing, Three Common Bottom Bracket Misconceptions