Figure 7-12.--Size designation of tires.
Julian date (last digit of the year followed by the day of
inches. If only one numerical designation is used for a
the year, or 17 Oct 1985 = 5290). The next positions are
tire, you should assume that it is the outside diameter
completed by the manufacturer and are either numbers
or letters. They are used to create a unique serial
Standard Identification Markings
number for a particular tire. The cut limit (item 11) is
expressed in thirty-seconds of an inch and is used to
You should be familiar with the markings on the
evaluate the depth of cuts in the thread area. Tires are
sidewall of a tire. You will need this information to
marked with a red dot (item 14) on the sidewall to
complete a VIDS/MAF for a tire change. The markings
indicate the lightweight (balance) point of the tire.
engraved or embossed on a sidewall are shown in figure
Rebuilt Tires Identification Markings
Most of the markings are self-explanatory. Item 10
In the tire rebuilding process, additional mark-
has a maximum of 10 characters. The first four
ings are engraved or embossed on the sidewall. See
positions show the date of manufacture in the form of a
Figure 7-13.--New tire identification markings.