Odd question about tires

If your car is accelerating hard the tires will have wrinkles all the way down. Have a friend check your black marks on the starting line. Low air pressure will cause two dark lines at the edge of your tire print. To much air will cause a dark spot in the middle. Even darkness all the way across is what you are after. Heavier cars usually need alittle more air, you should be close.
Did you say 13.5 wide tires? What size of a rim are they on? Is the rear tubbed?