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745
Maintenance
2.Tire size designation
A tire’s sidewall is marked with a tire
size designation. You will need this
information when selecting replace-
ment tires for your vehicle. The fol-
lowing explains what the letters and
numbers in the tire size designation
mean.
Example tire size designation:
(These numbers are provided as an
example only; your tire size designa-
tor could vary depending on your
vehicle.)
P235/65R17 108T
P - Applicable vehicle type (tires
marked with the prefix “P’’ are
intended for use on passenger
vehicles or light trucks; however,
not all tires have this marking).
235 - Tire width in millimeters.
65 - Aspect ratio. The tire’s chapter
height as a percentage of its
width.
R - Tire construction code (Radial).
17 - Rim diameter in inches.
108 - Load Index, a numerical code
associated with the maximum
load the tire can carry.
T - Speed Rating Symbol. See the
speed rating chart in this chapter
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:
7.0JX17
7.0 - Rim width in inches.
J - Rim contour designation.
17 - Rim diameter in inches.
UMA PE USA 7.qxp 12/22/2017 4:51 PM Page 45
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