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Tire dimensions

Section width
Is the largest width of unloaded tyre installed on a measuring rim and inflated to a pressure corresponding to its maximum load carrying capacity.

Rim diameter
Is the inner diameter of the tyre corresponding to the nominal diameter of a measuring rim on which the tyre should be installed.

Overall tyre diameter
Is the largest diameter of unloaded tyre installed on a measuring rim and inflated to a pressure corresponding to its maximum load carrying capacity.

Section height
Is a half of the difference between the overall tyre diameter and the rim diameter.