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368 Wheels and tires
Tire labeling
Overview of tire labeling
1
Uniform Tire Quality Grading Standard
(
page 368)
/
2
DOT, Tire Identification Number
(
page 369)
/
3
Maximum tire load (
page 370)
/
4
Maximum tire pressure (
page 370)
/
5
Manufacturer
6
Characteristics of the tire (
page 371)
/
7
Tire size designation, load-bearing capacity,
speed rating and load index (
/
8
Tire name
%
The data shown in the image is example
data.
Tire Quality Grading
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 371)
1
Tread wear grade
2
Traction grade
3
Temperature grade
%
The data shown in the illustration is example
data.
%
The classification is not legally stipulated for
Canada, but it is generally stated.
Tread wear grade
The treadwear grade is a comparative rating
based on the wear rate of the tire when tested
under controlled conditions on a specified gov‐
ernment test course. For example, a tire graded
150 would wear one and one-half (1\1/2) times
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