Jeep Tyre sizing guide
Example: 225/70R15
225 = Section width in millimeters
70 = Aspect ratio (ratio of section height to section width)
15 = Rim diameter
R = Radial Construction B = Bias Construction D = Bias Belted Construction
To calculate:
Tire Width: Section width divided by 25.4 (Ex: 225 / 25.4 = 8.86")
Section Height: Tire width times aspect ratio (Ex: 8.86" x 70% = 6.20")
Overall Diameter: Section height times 2 plus rim diameter (Ex: (6.20" x 2) + 15 = 27.40")