How big are Continental GP tires on C17 rims?

[p nut]

Looking to pick up a Campag C17 wheelset and some Continental GP tires (not sure if I'm going 4000 or 4Seasons). Looks like my bike can take max of 28mm with comfortable clearance of ~4mm.

Anyone with these rims have actual measurements for these tires? I'll most likely go with 700x25 size.

[MagicHour]

Don't have Campy, but GP4000S II 700cx25 - measures ~27.5mm on my Fulcrum Quattro LGs, those are 17C rims. Same internal width as a Campy C17-correct?

[raisinberry777]

http://www.bicyclerollingresistance....-4000s-ii-2014

This guy measures 27mm wide and 25mm tall (17C rim)

[fignon's barber]

Just went to my garage and measured with a digital caliper:
25mm conti gp4000s on c15 shamal: 26.33mm
25mm conti gp4000s on c17 shamal: 27.01mm

Not much difference between the C15 and C17

[p nut]

So it sounds like I'll be maxed out with the 25mm tires. I didn't know they plumped out that much. Thanks to all of you for the inputs.