Tire characteristics, Definition of terms for tires and loading, Tire ply composition and material used – Mercedes-Benz E-Cab 2012 Owners Manual User Manual

Page 331: Dot (department of transportation), Normal occupant weight, Uniform tire quality grading standards, Recommended tire pressure, Wheels and tires

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Manufacturer identification code:

manufacturer identification code ; provides
details on the tire manufacturer. New tires
have a code with two symbols. Retreaded
tires have a code with four symbols.
Further information about retreaded tires
(

Y

page 308).

Tire size: identifier = describes the tire size.
Tire type code: tire type code ? can be
used by the manufacturer as a code to
describe specific characteristics of the tire.
Date of manufacture: date of manufacture
A provides information about the age of a
tire. The first and second positions represent
the week of manufacture, starting with "01"
for the first calendar week. Positions three
and four represent the year of manufacture.
For example, a tire that is marked with
"3208", was manufactured in week 32 in
2008.

Tire characteristics

i

Tire data is vehicle-specific and may

deviate from the data in the example.

This information describes the tire cord and
the number of layers in sidewall : and under
the tread ;.

Definition of terms for tires and

loading

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. There are
14.5038 pounds per square inch (psi) to
1 bar; there are 100 kilopascals (kPa) to
1 bar.

DOT (Department of Transportation)

DOT marked tires fulfill the requirements of
the United States Department of
Transportation.

Normal occupant weight

The number of occupants the vehicle is
designed to seat, multiplied by 68 kilograms
(150 lbs).

Uniform Tire Quality Grading

Standards

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
contains the recommended tire pressures for

Definition of terms for tires and loading

329

Wheels and tires

Z

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