this is something i was curious about... my friend has a crossfire and they run those sizes and i love the way it looks gives it an aggressive stance, but thats how it comes stock so i don't know about what it looks like aftermarket or if it would screw with the cpu...
? you run staggered wheel sizes on two sets of rims? how many rims do you have?!
? you run staggered wheel sizes on two sets of rims? how many rims do you have?! cuz he was saying not different widths but different rim sizes..
I have 3 sets of wheels for my car
17x7 Stock Chrome LSE wheels:
255/45 tires all around
18" Jag S-Type R Wheels:
Rear 18x9.5 with 285/35 tire
Front 18x8 with 245/40 tire
19" Fondmetal wheels 19x8 all around
Rear 255/40 tire
Front 245/35 tire
^^ Agreed. If the overall tire diameter is different from front to back your wheels will be spinning at different rates. This will cause Traction control to activate. It may not do so until you get up to highway speeds depending on the amount of difference in tire diameters. Once the TC activates it will either brake the wheels it thinks are spinning or reduce engine power until you slow down.
Here is a nice tool for tire size matching on oversize wheels:
http://www.miata.net/garage/tirecalc.html
you have any pics of the rear of your car with the 285's? Thats gotta look so mean..........