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.
9
IF YOU NEED CONSUMER ASSISTANCE 479
Calibration, Compass..................... 216
Capacities, Fluid ........................ 451
Caps, Filler Fuel .............................. 361
Oil (Engine) ...................... 403,411
Power Steering ...................... 309
Radiator (Coolant Pressure) ............. 424
Car Washes ............................ 433
Carbon Monoxide Warning ...............80,357
Cargo (Vehicle Loading) ................... 363
Cellular Phone ....................... 11 1,275
Certification Label ....................... 363
Chains, Tire ............................ 341
Changing A Flat Tire ..................... 380
Chart, Tire Sizing ........................ 324
Check Engine Light
(Malfunction Indicator Light) ............... 406
Checking Your Vehicle For Safety ............. 79
Checks, Safety ........................... 79 Child Restraint
.................... 67,69,73,75
Child Restraint Tether Anchors .............71,73
Cigar Lighter ........................... 181
Clean Air Gasoline ....................... 353
Cleaning Wheels ............................ 435
Windshield Wiper Blades ............... 418
Climate Control ......................... 275
Clock ........................ 221,224,243,252
Coin Holder ........................... 183
Compact Disc (CD) Maintenance ............. 275
Compact Spare Tire ...................... 336
Compass ........................... 208,216
Compass Calibration ..................... 216
Compass Variance ....................... 217
Computer, Trip/Travel .................... 214
Connector UCI .............................. 266
Universal Consumer Interface (UCI) ....... 266
484 INDEX
