2004-2007 Cadillac CTS-V Performance Mods Discussion, 265/40-18 on stock wheels(all around) in Cadillac CTS-V Series Forum - 2004 - 2007; I know from a little research that they will fit with stock suspension... So I'm just wondering who has run ...
I don't have any clue how they will do on the car but will look forward to hearing what you say about them. as I just went stock size when I got new tires last year because I wasn't sure if we could do wider on that rim. I would like to at some point if those work get some wider ones.
I'm currently running 255/45 tires. Not as wide but taller than stock. If I hit a major dip or bump in the road at speed the fronts rub. Other than that no contact.... makes me think you will be okay. Personally I couldn't stand the wheel well gap with the stock tires which is why I went a .5" larger, not to mention I kinda like the beefy look and the extra 10mm doesn't hurt. I can notice the slight gear reduction and I like it especially in 1st gear.
I can email you some pics but it won't let me upload from my iPad. They really don't show much. I can get an inspection mirror I between the knuckle and the tire but that is about it. Probably 3/16" or 1/4" of clearance. It is very close but clears.