How low can a tire profile go?
from Modern Tire Dealer
High performance and low profile logically fit together when it comes to tire design. Or more accurately, high performance and aspect ratio. The lower the aspect ratio, the wider the tire. That is because the aspect ratio is the height of the tire's cross-section — its profile — divided by its width, sometimes called the section width. Size 225/65R17 has an aspect ratio of 65, which means the tire's profile is 65 percent the length of the width. A size 225/50R17 has a profile 50 percent of the length of the width.
7701 Las Colinas Blvd., Ste. 800, Irving, TX 75063