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SECTION II. EQUIPMENT DESCRIPTION AND DATA (Con't)
1-9. TIRE MARKINGS AND CODES (Con't).
f. BALANCE MARK.
Some tire manufacturers of Passenger Car, Light Truck and Medium Truck highway tires mark their tires
with a small ink dot, approximately 1/4 inch (6.4 mm) in diameter, near the bead. This dot is usually a
light color (yellow, blue or red) color and indicate the lightest area of the tire. To provide optimum
balance this ink dot should be aligned with the valve stem when mounting the tire.
g. MATERIAL CODES.
These material codes may be marked on older tires. Newer tires no longer require these markings.
(1) Rayon Cord. Tires with rayon cord are identified with the word RAYON or the letter R
on the sidewall.
(2) Nylon Cord. Tires with nylon cord are identified with the word NYLON or the letter N
on the sidewall.
(3) Natural Rubber. Tires utilizing natural rubber are identified with the letters NR on the
sidewall.
(4) Synthetic Rubber. Tires utilizing synthetic rubber are identified with the letter S on the
sidewall.
(5) Tubeless Tires. Tubeless tires are identified by the word TUBELESS on the sidewall.
(6) Ozone Resistant. Some tires are constructed of ozone resistant material may be identified
with the word OZONE or the letters OZ or O on the sidewall.
h. SPECIAL PURPOSE CODES.
These special purpose codes may be marked on older tires but are no longer required for newer tires.
(1) Military Tires. Some Military tactical tires may be identified with the word MILITARY
on the sidewall.
INK DOT
(LIGHT AREA OF THE TIRE)
