2004 Honda S2000 Owner's Manual - Page 187

Tire Labeling The tires that came on your vehicle have a number of markings. Those you should be aware of are described below. Tire Size 17 91 Rim diameter in inches. Load index (a numerical code associated with the maximum load the tire can carry). Speed symbol (an alphabetical code indicating the maximum speed rating). 2202 Date of manufacture. Whenever tires are replaced, they should be replaced with tires of the same size. Following is an example of tire size with an explanation of what each component means. P245/40R17 91W P 245 40 Vehicle type (P indicates passenger vehicle). Tire width in millimeters. Aspect ratio (the tire's section height as a percentage of its width). W Tire Identification Number Tire Identification Number (TIN) is a group of numbers and letters that look like the following example TIN. DOT B97R FW6X 2202 DOT This indicates that the tire meets all requirements of the U.S. Department of Transportation. Manufacturer's identification mark. Tire type code. B97R R Tire construction code (R indicates radial). FW6X 184 Technical Information