Tire Safety Information
3.5.1.1 Information on Passenger Vehicle Tires
Please refer to the diagram below.
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P
The "P" indicates the tire is for passenger vehicles.
Next number
This three-digit number gives the width in millimeters of the tire from sidewall edge
to sidewall edge. In general, the larger the number, the wider the tire.
Next number
This two-digit number, known as the aspect ratio, gives the tire's ratio of height to
width. Numbers of 70 or lower indicate a short sidewall for improved steering
response and better overall handling on dry pavement.
R
The "R" stands for radial. Radial ply construction of tires has been the industry
standard for the past 20 years.
Next number
This two-digit number is the wheel or rim diameter in inches. If you change your
wheel size, you will have to purchase new tires to match the new wheel diameter.
Next number
This two- or three-digit number is the tire's load index. It is a measurement of how
much weight each tire can support. You may find this information in your owner's