0001 - the important thing is the overall diameter of the tire. For example, my car came with 185/75R14 and I now have 215/45R17. The two sets are very close in overall diameter. My speedo is 1.2% to fast. You could easily have 225 tires on a car that came with 215's as long as the aspect ratio changes accordingly. This
tire chooser works really good if you're not sure.