If you have 15" on the front and 17" in the rear someone has screwed up your car big time. If you have a touring model, then you get 17" on all 4 tires. Anything else you have 15" tires. Also make sure you get LRR tires on all 4 no matter what you switch to, or expect a significant drop in MPG.
Paradox- misread the specs. I believe either 15" or 17" tires can be used on all four tires and not a combination of the 2.
don't mix tire sizes. with the way the suspension is set up, the car starts to oversteer and gets a little hard to control at high speed . also.. if you change tire sizes too much, the computer trips out because everything needs to rotate at the same pace for traction and skid control to work.
Is this a subtle blonde joke, or are you a blonde A blonde cop stops blonde motorist and asks for her driving license. The Motorist scuffles around in her purse and can't find it. She says to the cop, "I must have left it at home officer." The cop says, "Well, do you have any kind of identification?" The motorist scuffles around in her purse again, and finds a pocket mirror. She looks at it and says to the cop, "All I have is this picture of myself." The cop says, "Let me see it, then." So the blonde motorist gives the mirror to the blonde cop, who looks at it, and replies, "Well, if I had known you were a police officer, I wouldn't have even pulled you over. You can go now."