The numbers and letters on a tire mean tire type, width, height to width ratio, construction type, diameter, load index, and speed rating. Some tires also list the severe weather rating.
A typical tire size might read: P 205/65 R 15 92 H Here's what that means. P — This denotes a Passenger or P-metric tire built to U.S. standards. Here are other possible prefixes: LT is for a light truck. ST is for a special trailer. T is for temporary, usually indicating a spare tire. European-standard tires won't have a prefix letter at all.
It tells us the size of the wheel that the tire is intended to fit. A size P215/65 R15 tire is made for a wheel with a 15" diameter. Load Index Indicates the maximum load that the tire can support when properly inflated. You'll also find the maximum load on the tire sidewall, in both pounds and kilograms. Learn more about tire load index.
Tire Size Meaning. There are two ways that tire manufacturers display tire size, inches and metric. To find the tire size meaning in inches is very straight forward. Example A : 33X12.50R15. The first number is your overall diameter of the tire. In this example the tire diameter or "height" is 33 inches tall.
Tires usually come in the following widths (in inches): 8, 10, 12, 13, 14, 15, 17, 18, 19, 20, 22, 23, 24, 26, and 28. Tires in these sizes are typically found on most passenger cars, light-duty light trucks, SUVs, minivans, and vans. Tires with a rim diameter measured in inches are called "inch rim" sizes.
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what do tire sizes mean