Jeep 2012 Wrangler Unlimited - Owner Manual - Manual (Page 436)

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 or S = Temporary compact 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
— ЉRЉ means radial construction
— ЉDЉ means diagonal or bias construction
15 = Rim diameter in inches (in)
434 STARTING AND OPERATING