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I just installed Firestone Wide Oval RFTs, 245/40/18 and 285/35/19 on C6 Z06 wheels on my 03 vert. Went with the 'Stones because of reasonable cost, I can't track the car, and they are run flats. The CEO/CFO preferred I get RFTs. So far on the street they have more grip and track nicely with low noise.
Have you considered Bridgestone Pontenza's? I am running 305/30/19's on the rear and they do not stick out at all. As long as you are running the proper offset on your wheels you will be fine with the sizes you mentioned. You could run a 265 or 275 up front. Bridgestone Pontenza's are priced right and I am pleased so far with their quality.
If you are going to purchase new tires consider calling Luke at the TireRack, he is a forum member and very knowledgable. He will make sure you order the right sizes to match your wheels and keep the proper rake of the car.
18's up front, 19's on the rear. 305/30/19 Michelin PS 2. they are on 11.5" CCW T10s. The sidewall sticks out but the contact patch doesn't. Probably wider than what you're looking for.
I have 295's on the back of mine and i will say that they are the BEST tires i have ever and think i will ever own. And ive owned alot. The dry traction and handling is unreal. Buy the michelin PS2s if u have the money, because they are expensive. I think my back were 460ish a piece!
Just got in new 19in CCW T10s to replace my 18in CCW 505a.
I went with the Nitto Tire Invo (285F , 305R). Freaky looking tire tread pattern, but looks like they will stick get to the road.
I had Pilot Sport Cups prior so I should be able to give a good writeup comparing those 2 tires. I figure for a lot less than the MPSC I would try the Nittos.
I'm running 275/30/19 front and 295/35/19 rear Pilot Sports. I'm not sure you can get both sizes any more though...
At any rate, these sizes look good. IMO, the car has to be dropped though. The fronts look really close to the inner fenders when the wheels are turned.
Thanks for the input everybody and keep it coming. I have purchased 2 305/30/19 Michelin PS2's used. Couldn't pass up the deal at $202.02 for both shipped, hopefully they come as described, otherwise I will be disputing it. So now I guess I am looking for 2 275/30/19 Michelin PS2's. I was really tempted by the BFGoodrich KDW's until I found out they will not be making any more 275/30/19's. BFGoodrich says they have phased them out. I wanted a tire I felt comfortable would be around if I ever had to replace one.