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:
Infants or small children
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Offroad Chops
The offroad portion of Subaru's press drive consisted of a lengthy course on
California's Catalina Island, and I had a chance to tackle some fairly
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Tire pressures
Check and, if necessary, adjust the pressure of each tire (including the spare) at least once a month and before any long journey.
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