|
I did this with my old Volvo and got better fuel mileage. I went from 195/60/15 to 205/55/16's. The reason I got better mileage was the slight increase in tire diameter which translated into lower rpms on the HIGHWAY. Any increase in wheel tire mass or width will get you lower fuel mileage in a daily driver.
In the Gen III's the 17's will cut your mileage about two to three miles per gallon over the stock 15's.
|