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Tire Sizing Chart EXAMPLE: Size Designation: P = Passenger car tire size based on U.S. design standards ⴖ....blank....ⴖ = Passenger car tire based on European design standards = Light truck tire based on U.S. design standards T = Temporary spare tire 31 = Overall diameter in inches (in) 215 = Section width in millimeters (mm) 65 = Aspect ratio in percent (%) — Ratio of section height to section width of tire 10.5 = Section width in inches (in) R = Construction code — ⬙R⬙ means radial construction — ⬙D⬙ means diagonal or bias construction 15 = Rim diameter in inches (in) 284 STARTING AND OPERATING |