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:
Control of a Vehicle
Braking, steering, and accelerating are important factors in helping to control
a vehicle while driving. ...
Removing the Flat Tire and Installing the Spare Tire
Take off the wheel cover or center cap, if the vehicle has one, to reach the
wheel bolts.
1. Do a safety check before proceeding. See If a Tire Goes Flat for more
information.
2. Turn the wheel ...
Trailer Brakes
A loaded trailer that weighs more than 900 kg (2,000 lbs) needs to have its own
brake system that is adequate for the weight of the trailer. Be sure to read and
follow the instructions for the tra ...