As I recall, mine are 225/70 16s and rub only slightly on the tightest turns. They haven't caused any problems in the over two years I have had them. I wouldn't hesitate to replace them with the same size. Calculating the diameter and width is easy from the size numbers if you want to fine tune your selection. I was looking for something a bit taller and narrower than stock when I chose those. As I remember, the exact size I wanted wasn't readily available.