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Tire Sidewall Information
Both US and Canada Federal regulations require tire
manufacturers to place standardized information on the sidewall
of all tires. This information identifies and describes the
fundamental characteristics of the tire and also provides a Tire
Identification Number for safety standard certification and incase
of a recall.
'P215/65R15 95H' is an example of a tire size, load index and
speed rating. The definitions of these items are listed below.
12.20
Maintenance and Technical Data
Information on 'P' Type Tires
The tire size, load index and speed rating for your vehicle may
be different from this example.
[1] P: A tire, designated by the Tire and Rim Association (T&RA),
that may be used for service on cars, SUVs, minivans and light
trucks.
If your tire size does not begin with a letter this may mean it
is designated by either ETRTO (European Tire and Rim Technical
Organization) or JATMA (Japan Tire Manufacturing Association).
[2] 215: The nominal width of the tire in millimetres from side
wall edge to side wall edge. In general, the larger the number, the
wider the tire.
[3] 65: The aspect ratio which gives the tire's ratio of height to
width.
[4] R: Shows a "radial" type tire.
[5] 15: 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.
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