Wheels and Tires

I just traded my 04 cobra in on a new C6 and was looking into going with some new wheels and tires. I was wondering if anyone could give some ideas as to how big of wheel and tire I can fit under a stock C6?

go with the stock zo6 (you cant beat the wieght with for the money) if you can get a hold of some they will be all the rim you need but tires is a whole different ball game, with tire get what suits you driving pref. for me a dragradial but they are not comfy for touring, just get what suits you driving style best

Thanks for responding to my question. Do you know how wide of a wheel I can put under the car in the front and back without having clearance issues?

275/35R18 in the front and 325/30R19 in the back
mabey a little bigger but thats about it it really comes to tire selection at that point

Is that 325 on a 10.5 inch wheel?

And a 9.5 inch on the front for the 275?