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Maintenance
1
2
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Tire sidewall labeling
This
information
identifies
describes the fundamental charac-
teristics of the tire and also provides
the tire identification number (TIN)
for safety standard certification. The
TIN can be used to identify the tire in
case of a recall.
1. Manufacturer or brand name
Manufacturer or Brand name is
shown.
7
46
2. Tire size designation
A tire's sidewall is marked with a tire
5,6
size designation. You will need this
information when selecting replace-
7
ment tires for your car. The following
explains what the letters and numbers
4
in the tire size designation mean.
Example tire size designation:
3
(These numbers are provided as an
example only; your tire size designator
could vary depending on your vehicle.)
I030B04JM
175/50R15 75H
and
175 - Tire width in millimeters.
50 - Aspect ratio. The tire's section
height as a percentage of its
width.
R - Tire construction code (Radial).
15 - Rim diameter in inches.
75 - Load Index, a numerical code
associated with the maximum
load the tire can carry.
- Speed Rating Symbol. See the
H
speed rating chart in this section
for additional information.
Wheel size designation
Wheels are also marked with impor-
tant information that you need if you
ever have to replace one. The follow-
ing explains what the letters and
numbers in the wheel size designa-
tion mean.
Example wheel size designation:
5.5JX15
5.5 - Rim width in inches.
J - Rim contour designation.
15 - Rim diameter in inches.
Tire speed ratings
The chart below lists many of the dif-
ferent speed ratings currently being
used for passenger car tires. The
speed rating is part of the tire size
designation on the sidewall of the
tire. This symbol corresponds to that
tire's designed maximum safe oper-
ating speed.
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