How are dimensions calculated?

The equivalent calculation answers a very specific rule . Discover it here

Calculation rule :

External design diameter of tyre can vary more 1.5 % or less 2%.

Example :

For original fitment 235/75 15

  • Therorerical external diameter : 733 mm
  • Max diameter : 733+(733*1.5%)=744 mm
  • Min diameter : 733-(733*2%)= 719 mm

Find possible conversions with our conversion guide .