Find a tire size diameter chart on sites such as Tire-Size-Conversion.com, TireRack.com, TyreSizeCalculator.com and GoodYear.com. CSGNetwork.com also features a conversion tool for translating tire size diameters from metric measurements into customary measurements.
A tire size diameter chart contains information about the internal sizes of the tire in order to tell with what size of rims they are compatible. Most charts are organized to display the diameter in inches with the different tire sub-sizes displayed beneath each. A tire typically has its diameter printed on the face, near the manufacturer name and other information such as load capacity and ideal tire pressure.