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SERVICE AND APPEARANCE CARE
mounted on a vehicle. The side of the tire
Speed Rating:
Vehicle Normal Load on the Tire:
that contains a whitewall, bears white let-
An alphanumeric code assigned to a tire
The load on an individual tire that is deter-
tering or bears manufacturer, brand and or
indicating the maximum speed at which a
mined by distributing to each axle its share
model name molding that is higher or
tire can operate.
of the curb weight, accessory weight, and
deeper than the same moldings on the
normal occupant weight
(distributed in
Traction:
other sidewall of the tire.
accordance with Table 1 shown below) and
The friction between the tire and the road
dividing by 2.
Passenger (P-Metric) Tire:
surface. The amount of grip provided.
A tire used on passenger cars and some
Tread:
TABLE 1 - Occupant Loading and Dis-
light duty trucks and multipurpose vehicles.
The portion of a tire that comes into con-
tribution For Vehicle Normal Load For
Production Options Weight:
tact with the road.
Various Designated Seating Capacities
The combined weight of those installed
Tread wear Indicators:
regular production options weighing over
Designated
Vehicle nor-
Occupant
Narrow bands, sometimes called
“wear
seating capac-
mal load, num-
distribution in
2.3 kilograms in excess of those standard
bars,” that show across the tread of a tire
ity, number of
ber of
a normally
items which they replace, not previously
when only 2/32 inch of tread remains.
occupants
occupants
loaded vehicle
considered in curb weight or accessory
weight, including heavy duty brakes, ride
UTQGS:
2 through 4
2
2 in front
levelers, roof rack, heavy duty battery, and
Uniform Tire Quality Grading Standards, a
2 in front, 1 in
special trim.
tire information system that provides con-
5 through 10
3
second seat
sumers with ratings for a tire’s traction,
Recommended Inflation Pressure:
temperature and tread wear. Ratings are
Vehicle manufacturer’s recommended tire
Vehicle Placard:
determined by tire manufacturers using
inflation pressure shown on the tire plac-
A label permanently attached to a vehicle
government testing procedures. The rat-
ard.
showing the original equipment tire size
ings are molded into the sidewall of the
and recommended inflation pressure.
Radial Ply Tire:
tire.
A pneumatic tire in which the ply cords that
Vehicle Capacity Weight:
extend to the beads are laid at 90 degrees
The number of designated seating posi-
to the centerline of the tread.
tions multiplied by 150 lbs (68 kg) plus the
Rim:
rated cargo load.
A metal support for a tire and upon which
Vehicle Maximum Load on the Tire:
the tire beads are seated.
The load on an individual tire that is deter-
Sidewall:
mined by distributing to each axle its share
The portion of a tire between the tread and
of the maximum loaded vehicle weight and
the bead.
dividing by two.
5-32
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