DEPARTMENT OF TRANSPORTATION UNIFORM
TIRE QUALITY GRADES
The following tire grading categories were established by
the National Highway Traffic Safety Administration. The
specific grade rating assigned by the tire’s manufacturer
in each category is shown on the sidewall of the tires on
your vehicle.
All passenger car tires must conform to Federal safety
requirements in addition to these grades.
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
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 charac-
teristics and climate.
Traction Grades
The Traction grades, from highest to lowest, are AA, A, B,
and C. These grades represent the tire’s ability to stop on
wet pavement, as measured under controlled conditions
on specified government test surfaces of asphalt and
concrete. A tire marked C may have poor traction perfor-
mance.
WARNING!
The traction grade assigned to this tire is based on
straight-ahead braking traction tests, and does not
include acceleration, cornering, hydroplaning, or
peak traction characteristics.
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IF YOU NEED CONSUMER ASSISTANCE 569
Lower Anchors And Tethers For Children.......80
Older Children And Child Restraints..........76
Seating Positions........................79
Child Safety Locks.........................32
Clean Air Gasoline........................451
Cleaning
Wheels...............................524
Climate Control..........................337
Automatic............................337
Coin Holder.............................240
Cold Weather Operation....................372
Compact Spare Tire........................436
Connector
UCI . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ..333
Universal Consumer Interface (UCI)..........333
Console, Floor...........................240
Contract, Service..........................565
Coolant Pressure Cap (Radiator Cap)...........514
Cooling System...........................509
Adding Coolant (Antifreeze)...............512
Coolant Capacity.......................547
Coolant Level..........................510
Disposal of Used Coolant.................514
Drain, Flush, and Refill...................511
Inspection............................515
Points to Remember.....................515
Pressure Cap..........................514
Radiator Cap..........................514
Selection of Coolant (Antifreeze).............511
Corrosion Protection.......................521
Cruise Control (Speed Control)................169
Cupholders.............................237
Customer Assistance.......................563
Customer Programmable Features.............280
Data Recorder, Event.......................72
Daytime Brightness, Interior Lights.............155
Daytime Running Lights....................149
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INDEX 575
