Ah, the wheel size debate. Apparently some "colder" climate states get only all season tires, which Kia mounts on 18" wheels instead of 19s. The issue being debated is whether or not a limit to your top speed of 140 mph, instead of 167 mph, is going to ruin your day. Some owners are very OC about this. Most seem to have the attitude that 140 mph is fast enough! Kia has published "warnings" in several places saying that the smaller rims with all season tires have a lower top speed than the vaunted and much publicized 167 mph. So it isn't as though they are hiding the difference. But the "167 mph" gets more attention, naturally.