Trying to figure out the wheel size I need to order.

Be careful here. I cannot remember if that's the "WRONG" axle width chart or not, but one that's been posted a bajillion times is WAY wrong. Maybe @crackedback will chime in. He knows which one is correct.

That said, I invested in a Percy's wheel tool some time ago. Worth every penny. It will tell you exactly how big a tire and how wide a wheel you can put n your car.