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8
8
Maintenance Tires and wheels
Production options weight The
combined weight of installed regular
production options weighing over 5
lb. (2.3 kg) in excess of the standard
items which they replace, not previ
-
ously considered in curb weight or
accessory weight, including heavy
duty brakes, ride levelers, roof rack,
heavy duty battery, and special
trim.
Recommended Inflation Pressure
V
e
hicle manufacturer's recom
-
mended tire inflation pressure and
shown on the tire placard.
Radial Ply Tire A p
ne
umatic 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 tir
e
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
tir
e and the road surface. The
amount of grip provided.
Tread The
p
ortion of a tire that
comes into contact with the road.
Treadwear Indicators N
arrow bands,
sometimes called "wear bars," that
show across the tread of a tire
when only 2/32 inch (1.6 mm) of
tread remains.
UTQGS
Uniform Tire Quality Grading
Stan
dards, a tire information sys
-
tem that provides consumers with
ratings for a tire's traction, tem
-
perature and treadwear. Ratings are
determined by tire manufacturers
using government testing proce
-
dures. The ratings are molded into
the sidewall of the tire.
Vehicle Capacity Weight T
he
num
-
ber of designated seating positions
multiplied by 150 lbs. (68 kg) plus
the rated cargo and luggage load.
Vehicle Maximum Load on the Tire
L
o
ad on an individual tire due to curb
and accessory weight plus maxi
-
mum occupant and cargo weight.
Vehicle Normal Load on the Tire
Lo
ad on an individual tire that is
determined by distributing to each
axle its share of the curb weight,
accessory weight, and normal occu
-
pant weight and dividing by 2.
Vehicle Placard A label permanently
attach
ed to a vehicle showing the
original equipment tire size and rec
-
ommended inflation pressure.
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