![]() For instance, in a size P220/40 R17 tire, the width is 220 millimeters.Īspect Ratio is the ratio of the height of the tire's cross-section to its width. The first three-digit number in the tire size refers to the tire width. Tire Width is the width of the tire measured in millimeters from sidewall to sidewall. Consult your owner's manual or tire placard for the recommended tire size and inflation pressure for your vehicle.These tires generally require higher inflation pressures than passenger tires. Vehicle manufacturers equip some light trucks with "LT" type tires. The letters "LT," either at the beginning or at the end of the tire size indicate the tire was designed for light trucks.P-Metric and Euro-Metric tires may have different load capacities. If a tire size has no letters at the beginning, this indicates a Euro metric tire.Tire Type The letter "P" at the beginning of the "Tire Size" tells us the tire is a P-Metric tire, referring to tires made to certain standards within the United States, intended for Passenger vehicles.The numbers are indicators of the size, type, and performance of the tire. With a little explanation it's easy to understand what all of the letters and numbers mean on your tire's sidewall.Enjoy this app for all your tire size comparison needs. ![]() It also shows examples of your speedometer reading with the first tire, and the actual speed you're traveling if you were to install the second tire.Īn illustration between 2 tire size and shape are show for better understanding on how it looks like.Ī very useful tool when searching for tires that are a different size than stock. Tire size calculator takes two tire sizes and directly calculates the differences between the tires diameter, width, sidewall, circumference and revolutions per mile. Use our tire size calculator to compare diameter, width, sidewall, circumference and revolutions per mile for 2 tires. Tire size comparison the easy way before you buy.
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