Do the caad 9 's use the campy standard or canecreek headset standard? Thanks.

doest the caad9 have like oversized headtubes? i always thought it used proprietary cannondale headsets

my caad9 uses an integrated headset I think. Dont know much about those, its my first bike with one.

The CAAD9 uses standard 1 1/8 headsets. Only System6 uses oversize.

That is correct but you can also use a standard 1 1/8 as well.

Let me rephrase my question does it use a campy style is headset or a canecreek? Thanks

Campy 45/45. They've used these for several generations, no particular reason to change now.