sidewall numbers

  1. Jet Rootka

    Tire Size Calculations

    The tire size numbers like 245 45 r16 can be understood this way.... The 16 is easy it is the tire diameter or the size of rim it will fit. The 245 is in mm (metric) and is the width of the tire. The 45 is the height factor and is a percentage of the width. So to calculate the overall height...