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Tire Sizing Chart
EXAMPLE:
Size Designation:
P = Passenger car tire size based on U.S. design standards
(....blank....( = Passenger car tire based on European design standards
LT = 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
—9R9 means radial construction
—9D9 means diagonal or bias construction
15 = Rim diameter in inches (in)
STARTING AND OPERATING 305
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