Originally Posted by rangerbay
Ive got a question for you. What is the contact area for a 16" vs a 15" of the same width and aspect ratio? Do you think its actually the same?
Your question is too general in nature. The contact patch is based on more than just wheel diameter and tire size. Tire construction, air pressure, car weight, camber,etc. are just a few of the variables that determine the size of the contact patch and shape. Even with that info I'm not the one who could do the appropriate calculations. The length of the contact patch varies very little between tires close in overall diameter. The width of the tire is what is responsible for the bulk of the contact area.