GAWR RR :
Gross Axle Weight Rating for the rear
axle. See Loading Your Vehicle on page 4-35 .
Intended Outboard Sidewall :
The side of
an asymmetrical tire, that must always face
outward when mounted on a vehicle.
Kilopascal (kPa) :
The metric unit for air pressure.
Light Truck (LT-Metric) Tire :
A tire used on
light duty trucks and some multipurpose passenger
vehicles.
Load Index :
An assigned number ranging from
1 to 279 that corresponds to the load carrying
capacity of a tire.
Maximum In ation Pressure :
The maximum air
pressure to which a cold tire can be in ated.
The maximum air pressure is molded onto the
sidewall.
Maximum Load Rating :
The load rating for a tire
at the maximum permissible in ation pressure
for that tire.
Maximum Loaded Vehicle Weight :
The sum of
curb weight, accessory weight, vehicle capacity
weight, and production options weight. Normal Occupant Weight :
The number of
occupants a vehicle is designed to seat multiplied
by 150 lbs (68 kg). See Loading Your Vehicle
on page 4-35 .
Occupant Distribution :
Designated seating
positions.
Outward Facing Sidewall :
The side of an
asymmetrical tire that has a particular side that
faces outward when mounted on a vehicle.
The side of the tire that contains a whitewall, bears
white lettering, or bears manufacturer, brand,
and/or model name molding that is higher
or deeper than the same moldings on the other
sidewall of the tire.
Passenger (P-Metric) Tire :
A tire used on
passenger cars and some light duty trucks and
multipurpose vehicles.
Recommended In ation Pressure :
Vehicle
manufacturer’s recommended tire in ation
pressure as shown on the tire placard.
See Inflation - Tire Pressure on page 5-62
and Loading Your Vehicle on page 4-35 .
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Radial Ply Tire :
A pneumatic tire in which the
ply cords that extend to the beads are laid at
90 degrees to the centerline of the tread.
Rim :
A metal support for a tire and upon which
the tire beads are seated.
Sidewall :
The portion of a tire between the tread
and the bead.
Speed Rating :
An alphanumeric code assigned to
a tire indicating the maximum speed at which a
tire can operate.
Traction :
The friction between the tire and the
road surface. The amount of grip provided.
Tread :
The portion of a tire that comes into
contact with the road.
Treadwear Indicators :
Narrow bands, sometimes
called wear bars, that show across the tread of
a tire when only 1/16 inch (1.6 mm) of tread
remains. See When It Is Time for New Tires on
page 5-71 . UTQGS (Uniform Tire Quality Grading
Standards) :
A tire information system that
provides consumers with ratings for a tire’s
traction, temperature, and treadwear. Ratings are
determined by tire manufacturers using
government testing procedures. The ratings are
molded into the sidewall of the tire. See Uniform
Tire Quality Grading on page 5-74 .
Vehicle Capacity Weight :
The number of
designated seating positions multiplied by
150 lbs (68 kg) plus the rated cargo load.
See Loading Your Vehicle on page 4-35 .
Vehicle Maximum Load on the Tire :
Load on
an individual tire due to curb weight, accessory
weight, occupant weight, and cargo weight.
Vehicle Placard :
A label permanently attached
to a vehicle showing the vehicle’s capacity
weight and the original equipment tire size and
recommended in ation pressure. See “Tire and
Loading Information Label” under Loading
Your Vehicle on page 4-35 .
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