Table of Contents
Advertisement
Tire labeling
Overview of tire labeling
1
Uniform Tire Quality Grading Standards
(
page 305)
/
2
DOT (Department of Transportation), (TIN)
Tire Identification Number (
3
Maximum tire load (
4
Maximum tire pressure (
5
Manufacturer
6
Characteristics of the tire (
7
Tire size designation, load-bearing capacity,
speed rating and load index (
8
Tire name
%
The data shown in the illustration is sample
data.
Information on tire quality grades
According to the requirements of the U.S.
Department of Transportation's "Uniform Tire
Quality Grading Standards" tire manufacturers
must grade their tires using the following three
performance factors:
page 306)
/
page 306)
/
page 307)
/
page 307)
/
page 307)
/
1
Tread wear grade
2
Traction grade
3
Temperature grade
%
The data shown in the illustration is sample
data.
%
This grading is not legally prescribed for Can‐
ada, but specified in most cases anyway.
Tread wear grade
The tread wear grade is a comparative grading
based on tread wear grade tests conducted
under controlled conditions on a specified U.S.
Department of Transportation test track. For
example, a tire graded 150 would wear one and
one-half times as well on the government test
track as a tire graded 100.
The relative performance of tires depends upon
the actual conditions of their use, however, and
may depart significantly from the norm due to
variations in driving habits, service practices and
differences in road characteristics and climate
conditions.
Traction grade
& DANGER Risk of accident due to inade‐
quate traction
The traction grade assigned to this tire is
based on straight-ahead braking traction
tests, and does not include either accelera‐
tion, cornering, hydroplaning or peak traction
characteristics.
Always adapt your driving style and
#
drive at a speed to suit the prevailing
traffic and weather conditions.
* NOTE Damage to the drivetrain from
wheelspin
Avoid wheelspin.
#
The traction grades – from highest to lowest –
are AA, A, B and C. These grades relate to the
Wheels and tires 305
Advertisement
Table of Contents
