to degenerate and reduce tire life, and
excessive temperature can lead to sudden
tire failure. The grade C corresponds to a level
of performance which all passenger car tires
must meet under the Federal Motor Vehicle
Safety Standard No. 109. Grades B and A
represent higher levels of performance on the
laboratory test wheel than the minimum
required by law.
Tire labeling
Overview of tire labeling
:
Uniform tire Quality Grading Standard
(
Y
page 247)
;
DOT tire Identification Number
(
Y
page 246)
=
Maximum tire load (
Y
page 246)
?
Maximum tire pressures (
Y
page 233)
A
Manufacturer
B
Tire material (
Y
page 246)
C
Tire size designation, load-bearing
capacity and speed rating (
Y
page 243)
D
Load identification (
Y
page 245)
E
Tire name
The markings described above are on the tire
in addition to the tire name (sales
designation) and the manufacturer's name.
i
Tire data is vehicle-specific and may
deviate from the data in the example.
Tire size designation, load-bearing
capacity and speed rating
G
WARNING
Exceeding the stated tire load-bearing
capacity and the approved maximum speed
could lead to tire damage or the tire bursting.
There is a risk of accident.
Therefore, only use tire types and sizes
approved for your vehicle model. Observe the
tire load rating and speed rating required for
your vehicle.
:
Tire width
;
Height-width ratio in percentage
=
Tire code
?
Rim diameter
A
Load bearing index
B
Speed rating
General: depending on the manufacturer's
standards, a letter is imprinted into the tire
wall before the size description.
If there is no letter preceding the size
description (as shown above): these are
passenger vehicle tires according to
European manufacturing standards.
If "P" precedes the size description:
passenger vehicle tires according to U.S.
manufacturing standards.
Tire labeling
243
Whe
el
s
and
tire
s
Z
