1. Tire Size
- 320 tells the nominal section width in millimeters. This is the measurement from one sidewall to another.
- 65 is the aspect ratio. The lower the ration, the lower the sidewall height.
- The letter R indicates radial construction. Read more about Radial Traction Solutions and see a Traction Comparison Chart.
-15 indicates the rim diameter and means this tire would fit a rim with a 15 inch diameter.