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I am not an authority but I have seen posts where folks have used this size on stock wheels when the tire mfr did not offer the 265ZR40-17. Dimensionally it is barely larger diameter than the SCs. I would buy this larger tire if necessary to get the mfr and product that I want in the next set of tires I buy.
I ran 265s on my zo6 18" and dont think 275 would have been a problem at all, I have a 10" wide frt 18" now and have 275s because of a good deal on pilots but a 285 would be perfect on my 10", I'm running 335s on my 11.5" rears and they don't buldge even though I would have preferred a 12" rim with these they would stick out noticeably with the extra 1/2" and I didn't want to tub.
2002 Electron Blue/Mod-Red Z06
Fastech F1 cam, Borla Stingers, TPIS long tubes w/ Magnaflow X-pipe and no cats, Vortex Rammer, B&M Ripper, V1
411rwhp 386rwt running pretty rich dyno tuning soon hopefully
Thanks dude. Hey, I know you've been in India or something, and you may have missed the tuning special at 21st CMC. Here's a link if you're interested: http://forums.corvetteforum.com/zerothread?id=470010
I got some great gains from doing mine, and the lifetime deal is great. I believe J.P. said he was extending this special. :cheers: