2004 Saab 9-3 Owner's Manual - Page 238
2004 Saab 9-3 Manual
Page 238 highlights
238 Car care Uniform Tire Quality Grading (UTQG): Tire manufacturers are required to grade tires based on ee performance factors: treadwear, traction and temperature resistance. For more information see "Uniform Tire Quality Grading" on page 235. Maximum Cold Inflation Load Limit: Maximum load that can be carried and the maximum pressure needed to support that load. For information on recommended tire pressure see "Recommended lowest tire pressure, cold tires" on page 277 and "Loading Your Vehicle" on page 240. Tire Sidewall Labeling Useful information about a tire is molded into it´s sidewall. Tire size: The tire size ia a combination of letters and numbers used to define a particular tire´s width, height, aspect ratio, construction type and service description. Department of Transportation (DOT): The Department of Transportation (DOT) code indicates that the tire is in compliance with the U.S. Department of Transportation Motor Vehicle Safety standards. Tire Identification Number (TIN): The letters and numbers following DOT code are the Tire Identification Number (TIN). The TIN shows the manufacturer and plant code, tire size, and and date the tire was manufactured. The TIN is molded onto both sides of the tire. Tire Ply Material: The type of cord and number of plies in the sidewall and under the tread. Tire Size The following illustration shows an example of a typical passenger car tire size. P | a a b c d e f g 215 / 55 | b | c R | d 16 | e 93 | f H | g Passenger (P-Metric) Tire Tire Width Aspect Ratio Belt Rating Rim diameter Load range Speed rating Passenger (P-Metric) Tire: The United States version of a metric tire sizing system. The letter "P" as the first character in the tire size means a passenger vehicle tire engineered to standards set by the U.S Tire and Rim Association. Tire Width: The three-digit number indicates the tire section width in millimeters from sidewall to sidewall.