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Cadillac CTS/CTS-V Owner Manual (GMNA-Localizing-U.S./Canada/Mexico-
12460273) - 2019 - CRC - 5/16/18
VEHICLE CARE 305
diagonal or bias ply constructi on;
and the letter B means belted-bias
ply construction.
(5) Rim Diameter
: Diameter of
the wheel in inches.
(6) Service Descriptio n
: These
characters represent the load
index and speed rating of the tire.
The load index represents the load
carrying capacity a tire is cert ified
to carry. The speed rating is the
maximum speed a tire is cer tified
to carry a load.
Tire Terminology and
Definitions
Air Pressure : The amount of air
inside the tire pressing outward
on each square inch of the tire.
Air pressure is expressed in kPa
(kilopascal) or psi (pounds per
square inch).
Accessory Weight
: The combined
weight of optional accessories.
Some examples of optional
accessories are automatic
transmission, power windows,
power seats, and air conditioning.
Aspect Ratio
: The relationship of
a tire's height to its width.
Belt
: A rubber coated layer of
cords between the plies and the
tread. Cords may be made from
steel or other reinforcing
materials.
Bead
: The tire bead contains steel
wires wrapped by steel cords that
hold the tire onto the rim.
Bias Ply Tire
: A pneumatic tire in
which the plies are laid at
alternate angles less than
90 degrees to the centerline of the
tread.
Cold Tire Pressure
: The amount
of air pressure in a tire, measured
in kPa (kilopascal) or psi (pounds
per square inch) before a tire has
built up heat from driving. See
Tire Pressure 0 307.
Curb Weight
: The weight of a
motor vehicle with standard and
optional equipment includin g the
maximum capacity of fuel, oil, and
coolant, but without passengers
and cargo.
DOT Markings
: A code molded
into the sidewall of a tire
signifying that the tire is in
compliance with the U.S.
Department of Transportation
(DOT) Motor Vehicle Safety
Standards. The DOT code includes
the Tire Identification Number
(TIN), an alphanumeric designator
which can also identif y the tire
manufacturer, production plant,
brand, and date of production.
GVWR
: Gross Vehicle Weight
Rating. See Vehicle Load Limits
0 189.
GAWR FRT
: Gross Axle Weight
Rating for the front axle. See
Vehicle Load Limits 0 189.
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