2008 Mazda RX-8 Owner's Manual - Page 335

Customer Information and Reporting Safety Defects Tire Information (U.S.A.) 11. Tread wear, traction and temperature grades 12. Max. permissible inflation pressure 13. SAFETY WARNING P215/65R15 95H is an example of a tire size and load index rating. Here is an explanation of the various components of that tire size and load index rating. Note that the tire size and load index rating may be different from the example. P Indicates a tire that may be installed on cars, SUVs, minivans and light trucks as designated by the Tire and Rim Association (T&RA). NOTE If your tire size does not begin with a letter this may mean it is designated by either ETRTO (European Tire and Rim Technical Organization) or JATMA (Japan Tire Manufacturing Association). 215 "215" is the nominal width of the tire in millimeters. This three-digit number gives the width in millimeters of the tire from sidewall edge to sidewall edge. In general, the larger the number, the wider the tire. 65 "65" is the aspect ratio. This two-digit number indicates the tire's ratio of height to width. R "R" is the tire construction symbol. R indicates "Radial ply construction". 15 "15" is the wheel rim diameter in inches. 95 "95" is the Load Index. This two-or three-digit number indicates how much weight each tire can support. 9-19