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 a half (1½) 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:
Tire Sidewall Labeling
Useful information about a tire is molded into the
sidewall. The following illustrations are examples
of a typical P-Metric and a LT-Metric tire sidewall.
(A)Tire Size: The tire size code is a ...
Driving On Grades
Reduce speed and shift to a lower gear before starting down a
long or steep downgrade. If the transmission is not shifted down, the brakes might
have to be used so much that they would get hot and ...
Owner Checks and Services
At Each Fuel Stop
Check the engine oil level. See Engine Oil .
Once a Month
Check the tire inflation pressures. See Tire Pressure .
Inspect the tires for wear. See Tire Inspection .
Che ...