Mercedes-Benz A-Class Operator's Manual page 306

304 304 Wheels and tires
T T ir ire labeling e labeling
Ov Over ervie view of tir w of tire labeling e labeling
1 Uniform Tire Quality Grading Standards
2 DOT (Department of Transportation), (TIN)
Tire Identi cation Number
3 Maximum tire load ( page 306)
/
4 Maximum tire pressure ( page 306)
/
5 Manufacturer
6 Tire characteristics ( page 307)
/
7 Tire size designation, load-bearing capacity,
speed rating and load index (
/
8
Tire name
% The data shown in the illustration is example
data.
T T ir ire Quality Gr e Quality Grading ading
In accordance with the US Department of Trans-
portation's "Uniform Tire Quality Grading Stand-
ards", tire manufacturers are required to grade
their tires on the basis of the following three per-
formance factors:
page 307)
1
Tread wear grade
2 Traction grade
3 Temperature grade
% The data shown in the illustration is example
data.
% The classi cation is not legally stipulated for
Canada, but it is generally stated.
T T r r ead w ead wear gr ear grade ade
The treadwear grade is a comparative rating
based on the wear rate of the tire when tested
under controlled conditions on a speci ed govern-
ment test course. For example, a tire graded 150
would wear one and one-half (1\1/2\) times as