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 departsignificantly 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.
IF YOU NEED CONSUMER ASSISTANCE 389
9
Child Restraint with Automatic Belts........... 64
Child Safety Locks........................ 30
Child Seat.............................. 68
Clean Air Gasoline....................... 297
Cleaning
Wheels............................. 349
Climate Control......................... 238
Clock.....................187,190,204,208,217
Coin Holder........................... 146
Compact Disc (CD) Maintenance............. 237
Compass Variance....................... 185
Console.............................. 146
Contract, Service........................ 385
Cool Down, Turbo....................... 252
Coolant (Antifreeze)...................359,360
Cooler, Beverage........................ 154
Cooling System......................... 339
Adding Coolant (Antifreeze).............. 341
Coolant Level......................340,343Disposal of Used Coolant................ 343
Drain, Flush, and Refill.................. 340
Inspection........................... 343
Points to Remember.................342,344
Pressure Cap......................... 342
Selection of Coolant (Antifreeze)........... 340
Corrosion Protection..................... 347
Cruise Light........................... 168
Cupholders............................ 146
Customer Assistance..................... 383
Data Recorder, Event...................... 58
Dealer Service.......................... 329
Defroster, Rear Window................... 153
Defroster, Windshield...................71,240
Delay (Intermittent) Wipers................. 128
Diagnostic System, Onboard................ 326
Dimmer Switch, Headlight................. 125
394 INDEX
