Whe el s and tire s, Definition of terms for tires and loading – Mercedes-Benz CLA-Class 2014 Owners Manual User Manual

Page 335

Tire characteristics

This information describes the tire cord and

the number of layers in sidewall : and under

tire tread ;.

Tire data is vehicle-specific and may devi-

ate from the data in the example.

Definition of terms for tires and load-

ing

Tire ply composition and material

used

Describes the number of plies or the number

of layers of rubber-coated fabric in the tire

tread and sidewall. These are made of steel,

nylon, polyester and other materials.

Bar

Metric unit for tire pressure. 14.5038 pounds

per square inch (psi) and 100 kilopascals

(kPa) are the equivalent of 1 bar.

DOT (Department of Transportation)

DOT marked tires fulfill the requirements of

the Canadian Transport Ministry.

Normal occupant weight

The number of occupants for which the vehi-

cle is designed multiplied by 68 kilograms

(150 lb).

Uniform Tire Quality Grading Stand-

ards

A uniform standard to grade the quality of

tires with regards to tread quality, tire traction

and temperature characteristics. Ratings are

determined by tire manufacturers using U.S.

government testing procedures. The ratings

are molded into the sidewall of the tire.

Recommended tire pressure

The recommended tire pressure applies to

the tires mounted at the factory.
The Tire and Loading Information placard con-

tains the recommended tire pressures for

cold tires on a fully loaded vehicle and for the

maximum permissible vehicle speed.
The tire pressure table contains the recom-

mended pressures for cold tires for various

operating conditions, i.e. differing load and

speed conditions.

Increased vehicle weight due to

optional equipment

This is the combined weight of all standard

and optional equipment available for the vehi-

cle, regardless of whether it is actually instal-

led on the vehicle or not.

Rim

This is the part of the wheel on which the tire

is mounted.

GAWR (Gross Axle Weight Rating)

The GAWR is the maximum gross axle weight

rating. The actual load on an axle must never

exceed the gross axle weight rating. The

gross axle weight rating can be found on the

vehicle identification plate on the B-pillar on

the driver's side.

Definition of terms for tires and loading

333

Whe

and

tire