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WHEELS AND TIRES
554perature is normally reached after the vehicle has been parked for at least 3 hours.
Related information
•
Tires (p. 550)
Tire sidewall designations
The following information can be found on a tire's sidewall.
Federal law mandates that tire manufacturers place standardized information on the sidewall ofall tires (see the illustration). The vehicle has been certified with certain combi- nations of wheels and tires. The following information is listed on the tire sidewall: The tire designation:
NOTE
Please be aware that the following tire desig- nation is an example only and that this par-
ticular tire may not be available on your vehi- cle.
1. 215 : the width of the tire (in millimeters)
from sidewall edge to sidewall edge. The larger the number, the wider the tire.
2. 65: The ratio of the tire's height to its width
in percent.
3. R: Radial tire (the designation RF and the
symbol indicate that the vehicle is
equipped with optional self-supporting run flat tires 3
.
4. 15: The diameter of the wheel rim (in
inches).
5. 95: The tire's load index. In this example, a
load index of 95 equals a maximum load of 1521 lbs (690 kg).
6. H: The tire's speed rating, or the maximum
speed at which the tire is designed to bedriven for extended periods of time, carryinga permissible load for the vehicle, and withcorrect inflation pressure. For example, Hindicates a speed rating of 210 km/h(130 mph).
3 Self-supporting run flat tires may not be available on all models.
WHEELS AND TIRES
556
Uniform Tire Quality Grading
ALL PASSENGER VEHICLE TIRES MUST CONFORM TO FEDERAL SAFETY REQUIRE-MENTS IN ADDITION TO THESE GRADES .
Quality grades can be found, where applica- ble, on the tire sidewall between the treadshoulder and maximum section width. Forexample: Treadwear 200 Traction AA Temperature A
TREADWEARThe treadwear grade is a comparative rating based on the wear rate of the tire when testedunder controlled conditions on a specified gov-ernment test course. For example, a tire graded150 would wear one and one half (1 ½) times aswell on the government course as a tire graded100. The relative performance of tires dependsupon the actual conditions of their use, however,and many depart significantly from the norm dueto variation in driving habits, maintenance practi-ces and differences in road characteristics andclimate.
TRACTIONThe traction grades, from highest to lowest, areAA, A, B, and C, as measured under controlledconditions on specified government test surfacesof asphalt and concrete. A tire marked C mayhave poor traction performance.
WARNING
The traction grade assigned to this tire is based on braking (straight-ahead) tractiontests and is not a measure of cornering (turn-ing) traction.
TEMPERATUREThe temperature grades are A (the highest), B, and C, representing the tire's resistance to thegeneration of heat and its ability to dissipate heatwhen tested under controlled conditions on aspecified indoor laboratory test wheel. Sustainedhigh temperature can cause the material of thetire to degenerate and reduce tire life, and exces-sive temperature can lead to sudden tire failure.The grade C corresponds to a minimum level ofperformance that all passenger vehicle tires mustmeet under the Federal Motor Safety StandardNo. 109. Grades B and A represent higher levelsof performance on the laboratory test wheel thanthe minimum required by law.
WARNING
The temperature grade for this tire is estab- lished for a tire that is properly inflated andnot overloaded. Excessive speed, under-infla-tion, or excessive loading, either separately orin combination, can cause heat buildup andtire failure.
Related information
•Tires (p. 550)
• Tire sidewall designations (p. 554)
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SPECIFICATIONS
658
Dimensionsmminches
I Wheel track, rear G 1667
H
1675 I 65.6
H
65.9 I
Wheel track, rear J 1671
H
1679 I 65.8
H
66.1 I
J Load width, floor 1192 46.9
K Width 1923K
1931 L
1958 M 75.7
K
76.0 L
77.1 M
L Width incl. rearview mir- rors 2140 84.3
M Width incl. folded rear-view mirrors 2008 79.1
A
At curb weight + 2 people. Varies slightly depending on tire dimensions, chassis, etc.)
B Does not apply to vehicles with 4 seats.
C From the second row of seats in 7-seat models. *
D Vehicles with 4 seats.
E Vehicles with 5 seats.
F Vehicles with 7 seats.
G Vehicles without pneumatic suspension.
H Vehicles with 19-inch wheels.
I Vehicles with 20, 21 and 22-inch wheels.
J Vehicles with pneumatic suspension.
K Chassis width.
L Width for vehicles with 19-inch wheels.
M Width for vehicles with 20, 21 and 22-inch wheels.
Related information
• Weights (p. 659)
