Tire Information
Tire Size Designation
A tire's side wall is marked with a
tire size designation. You will
need this information when
selecting replacement tires for
your car. The following explains
what the letters and numbers in
the tire size designation mean.
Example tire size designation:
195/60R15 88H
P
— Applicable vehicle type (tires
marked with the prefix "P" are
intended for use on passenger
cars; however, not all tires have
this marking).
195
— Tire width in millimeters.
60
— Aspect ratio. The tire's section
height as a percentage of its width.
R
— Tire construction code (Radial).
15
— Rim diameter in inches.
88
— Load Index, a numerical
code associated with the
maximum load the tire can carry.
H
— Speed Rating Symbol. See
the speed rating chart in this
section for additional information.
Wheel Size Designation
Wheels are also marked with
important information that you
need if you ever have to replace
one. The following explains what
the letters and numbers in the
wheel size designation mean.
Example wheel size designation:
15 x 5 1/2 JJ
15
— Rim diameter in inches.
5 1/2
— Rim width in inches.
JJ
— Rim contour designation.
Tire Speed Ratings
The chart shows many of the
different speed ratings currently
being used for passenger car tires.
The speed rating symbol is part of
the tire size designation on the
sidewall of the tire. This symbol
corresponds to that tire's designed
maximum safe operating speed.
Technical Information
