It isn't really for torque steer; they actually took the car to real road courses and found that it handled better with the slightly wider front tires. If it were only for torque steer or off the line grip, they could have put the same tires at all four corners. The GXP is a more fully developed package than even the Comp G version of the GTP, I believe.

Besides, there are lots of cars that do not permit normal tire rotations. The Vette, for example. Pretty much any Porsche or Ferrari. Honda S2000 (?). Sure, those are sports cars, though not all are super expensive (like the S2000). Lots of people daily drive Vettes and S2000s though.

Somehow I'm pretty sure the lack of ability to rotate the tires was considered. Heck, info like that has to show up in the owner's manual so uninformed customers don't try to do a front to rear rotation.

 

Thanks, it was between silver and black, and I was tired of maintaing black cars for the past 5 years. There aren't many sub 30k cars that would get me out of my f-body, this one did in the first few minutes of a test drive. I have owned 4 f-bodys, 2 of them LS1's and this car just blew me away. It moves out and sounds right, I read that they modeled the exhaust note after a mid 80's IROC-Z.

 

I understand having the different tire sizes on RWD performance cars where the weight is distributed better,but on a FWD'er where rotating the tires is mandatory,why wouldn't GM take that into consideration in giving the owner of the GXP GP the choice.
What I've seen in most FWD'er where the owner of the car was ignorant in keeping the tire rotated around, that owner was chaging tires every 25k miles or so while the original pair of rear tires just went along for the ride until the either dry rotted and gace out or wore so unevenly that there is a loud rumbling sound eminating from the rear of the car: and at (roughly) $150 a pop 4 an 18" tire there are going 2 be alot of pissed off GXP owners because their tires gave up the ghost too soon.

 

155mph top speed!! Pretty impressive. Keep the options in check and its not a bad price.