Originally Posted by Foghorn
Quite a few people have run 245s on 6.5" rims, but for the most part a 245 tire will have a cross-section of around 10" so it will not have as good a turn in response, or yaw charactorsistics, as the same tire in 225 width mounted on the same 6.5" rim.
Mind you if drag racing is your primary goal then the wider tire may be better. If autocross is more your style then the 225 would be better. The 1st generation W-body had 16" X 8" rims available that came with 225/60R16 tires, now those puppies would stick pretty well in corners.
His wheels weren't listed on any of those sheets, not to mention none of those were for 2002, not saying that isn't accurate, just that his wheels aren't on there, so it doesn't really tell me his wheels aren't 7", which I'm pretty sure they are.
Because the car is primarily street driven, the goal in going to the wider tire is to:
1) get a shorter tire (the 245/50'* are shorter than the stock tire)
2) get better straight line performance
3) get better cornering performance
4) get better braking
It should do all of those. I know the car pulls .78g on the skidpad stock (according to the magazines anyways), and someone with the same suspension mods (sway bars, strut tower braces, etc...), and stock rims with 245'* (different brand, but very similar tire) on it pulled a .93g on the skidpad. A huge difference and plenty for the street. And these tires are going to stick better in the corners because they are A LOT better than the stock goodyears, if not anything else. Not to mention the wider tires will make the car look meaner!
And the 1st generation w-body was available with LOTS of different rim/tire combinations. For instance some of them came with the 16X8 & 225/60/16'* like you said, and some of them came with the 16X8 & 245/50/16'* (like our turbo gp coupe which ONLY handles decent because of the tires), and some of them came with the 16X6.5 & 215/60/16 (like my STE), there were the regular steel wheels and hubcaps (15" I believe and some fairly narrow tires, like 195'* or something, like my sisters '93 GP LE has), and I believe there were actually a few more tire/wheel combos.