griff,
I have been wrestling with that question for a while now. I change my mind daily. The Cobra R wheel is 9.5" wide. According to Nitto, you can fit a 285/35-18 Nitto 555 on a 9.5" wheel. That size is 25.97" in diameter, so slightly larger than stock(25.7"). 265/35-18 is 25.28" in diameter, slightly smaller. If you don't have your car lowered and don't plan to than I wouldn't go smaller than stock. Lower profile tires give the illusion that the overall diameter is smaller than it really is. It's all personal preference. I went and looked at a Cobra R today and I verified that it had 265/40-18's all the way around. The front tire was flush with the fender. Remember that the Cobra R rim has a different offset than the stock 17's, so it sits out a little more. You can run into probs with a lowered car if you go too wide up front. The 265 looked plenty wide in the rear, but a 275/40-18 would work also. I have confused even myself, so I am sure I have confused you too. Sorry if that is the case.
Brad
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Dark Highland Green #1790
Mods:Baer Racing EradiSpeed Rotors, Eibach springs, Tri-Ax, Densecharger 100mm, 87mm Pro-M MAF, Steeda Undrdrv/P's & T/A, FRPP Alum D/S
<font size=-1>[ This Message was edited by: Brad1790 on 2001-11-03 20:43 ]</font>
<font size=-1>[ This Message was edited by: Brad1790 on 2001-11-03 20:54 ]</font>
<font size=-1>[ This Message was edited by: Brad1790 on 2001-11-03 20:56 ]</font>