Dodge 2008 Avenger Owner's Manual page 294

292 STARTING AND OPERATING
Tire Sizing Chart
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 of section height to section width of tire, written in percent (%)
10.5 Section width in inches (in)
R R means radial construction
D means diagonal or bias construction
15 Rim diameter in inches (in)
Tire Sizing Chart