Jeep grand cherokee 2018, Owner'S Manual, Page: 465 / 620

Tire Sizing Chart
EXAMPLE:
Example Size Designation: P215/65R15XL 95H, 215/65R15 96H, LT235/85R16C, T145/80D18 103M, 31x10.5 R15 LT
P
= Passenger car tire size based on U.S. design standards, or
ⴖ ....blank.... ⴖ = Passenger car tire based on European design standards, or
LT = Light truck tire based on U.S. design standards, or
T or S = Temporary spare tire or
31 = Overall diameter in inches (in)
215, 235, 145
= Section width in millimeters (mm)
65, 85, 80 = Aspect ratio in percent (%)
– Ratio of section height to section width of tire, or
10.5
= Section width in inches (in)
R = Construction code
– ⬙ R ⬙ means radial construction, or
– ⬙ D ⬙ means diagonal or bias construction
15, 16, 18 = Rim diameter in inches (in)
Service Description:
95
= Load Index
– A numerical code associated with the maximum load a tire can carry
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SERVICING AND MAINTENANCE 463