See also:

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 ...

Unfastening the seatbelt
Unfastening the seatbelt Push the button on the buckle. Before closing the door, make sure that the belts are retracted properly to avoid catching the belt webbing in the door. ...

Uniform Tire Quality Grading (UTQG)
For details, refer to “Uniform tire quality grading standards”. ...