Treadwear
The treadwear grade is a comparative rating based on the wear rate of the tire when tested under controlled conditions on a specified government test course.
For example, a tire graded 150 would wear one and one-half (1- 1/2) times as well on the government course 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.
See also:
Uniform tire quality grading standards
This information indicates the relative performance of passenger car tires in
the area of treadwear, traction, and temperature resistance. This is to aid the
consumer in making an informed choice ...
Seatbelt maintenance
To clean the seatbelts, use a mild soap and lukewarm water. Never bleach or dye
the belts because this could seriously affect their strength.
Inspect the seatbelts and attachments including the web ...
Passenger’s side power window switches
Each passenger window can be controlled by the power window switch located on
the door. ...