Originally posted by BonzoAPD
How would a set of 17's on the car affect mileage? Do they make you put more miles on the car or less?
Rim size doesn't matter, you need to calculate overall tire diameter. It is possible to have 17 inch rims and a smaller overall tire diameter than stock, or larger, depending on what size tires you use.
Heavier rims will require more throttle for the same acceleration, so you could chew through more fuel that way.