Originally Posted by ATX78703
quick question - if the track was widened as it shows on the spec sheet, why didn't they but wider rubber (like 265s) on the rear in sport pkg?
The optional 19s have 255 rears, but as for the others wheel/tire options my guess it goes back to ekeing out the best possible fuel economy they can. The wider the tire, the more resistance, and theoretically, the worse the efficiency. Now, its true that the economy number shown on the window sticker won't change with the 19" wheels, but by offering the narrower wheels standard on all models, they probably were able to get the EPA to test in that configuration.