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392
392 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 394)
/
4
Maximum tire pressure (
/
5
Manufacturer
6
Tire characteristics (
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
www.carobook.com
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 394)
page 395)
/
page 395)
/
ading
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
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