Step 3
Example 1
Example 2
Permissible load (maximum
gross vehicle weight rating from
the Tire and Loading Information
placard minus the gross weight
of all occupants)
1500 lbs (680 kg)
Ò
750 lbs
(340 kg) = 750 lbs (340 kg)
1500 lbs (680 kg)
Ò
200 lbs
(91 kg) = 1300 lbs (589 kg)
1
Uniform Tire Quality Grading Standards
(
/
page 253)
2
DOT (Department of Transportation), (TIN) Tire
Identification Number (
/
page 254)
3
Maximum tire load (
/
page 254)
4
Maximum tire pressure (
/
page 255)
5
Manufacturer
6
Characteristics of the tire (
/
page 255)
7
Tire size designation, load-bearing capacity
and speed rating (
/
page 255)
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. Depart-
ment of Transportation's "Uniform Tire Quality
Grading Standards" tire manufacturers must grade
their tires using the following three performance
factors:
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. Depart-
ment 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 gra-
ded 100.
The relative performance of tires depends upon
the actual conditions of their use, however, and
may depart significantly from the norm due to var-
iations in driving habits, service practices and dif-
ferences in road characteristics and climate condi-
tions.
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.
#
Always adapt your driving style and drive
at a speed to suit the prevailing traffic
and weather conditions.
Wheels and tires 253