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:
Speedometer
The speedometer shows the vehicle speed. ...
Wear indicators
1) New tread
2) Worn tread
3) Tread wear indicator
Each tire incorporates a tread wear indicator, which becomes visible when the
depth of the tread grooves decreases to 0.063 in (1.6 mm). A tir ...
Wheel replacement
When replacing wheels due, for example, to damage, make sure the replacement
wheels match the specifications of the wheels that are fitted as standard equipment.
Replacement wheels are available f ...