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 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:
General considerations
Vehicle maintenance
The overall state of the vehicle is an important factor which has a marked influence
over fuel consumption and driving comfort and on the life span of your vehicle.
For this r ...
Scheduled servicing
Correct maintenance of the vehicle is essential for ensuring it stays in tiptop
condition for a long time to come.
This is why Fiat has programmed a series of checks and maintenance operations
ev ...
Operation
When the shift lever is in the AutoStick position (to the left of the Drive position),
it can be moved forward and rearward. This allows the driver to manually select
the transmission gear being u ...