Table of Contents
Advertisement
Main Menu
Tire Information
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 car. The following
explains what the letters and num-
bers in the tire size designation
mean.
(Example tire size designation)
215/45ZR16
215 — Tire width in millimeters.
45 — Aspect ratio. The tire's section
height as a percentage of its width.
Z — Speed Rating Symbol. See the
speed rating chart in this section for
additional information.
R — Tire construction code (Radial).
16 — Rim diameter in inches.
Technical Information
Table of Contents
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)
16 x 7 JJ
16 — Rim diameter in inches.
7 — Rim width in inches.
JJ — Rim contour designation.
Tire Speed Ratings
The chart below 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. T h i s symbol
corresponds to that tire's designed
maximum safe operating speed.
Advertisement
Chapters
Table of Contents
