Front Tire Size

Your best bet will be a 215/65/15. Your backspace should be 4.25" on a 15x7, like it was from the factory. Even with 15x7's and 4.25" of backspace I had very little clearance on my Duster with 225/60/15's. So little that I used them as the model for how far out I could go when I was fitting my 275/35/18's. You might be able to get away with a 225/60/15 if your ride height is stock or higher. If it's lower, you'll hit the fenders with the 225's.