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 579
Caps, FillerFuel .............................. 462
Oil (Engine) ................... 518,519,526
Car Washes ............................ 547
Carbon Monoxide Warning ...............94,461
CD (Compact Disc) Player ................. 350
Cellular Phone ....................... 1 17,360
Chains, Tire ............................ 446
Changing A Flat Tire ..................... 484
Chart, Tire Sizing ........................ 428
Check Engine Light
(Malfunction Indicator Light) .............294,521
Checking Your Vehicle For Safety ............. 94
Checks, Safety ........................... 94
Child Restraint .................. 83,84,85,88,90
Child Restraint Tether Anchors .............87,88
Child Safety Locks ........................ 35
Clean Air Gasoline ....................... 458 Cleaning
Wheels ............................ 549
Climate Control ......................... 361
Clock ................................ 340
Clutch ............................... 542
Clutch Fluid ........................... 542
Coin Holder ........................... 268
Compact Disc (CD) Maintenance ............. 360
Compact Disc (CD) Player ................. 350
Compact Spare Tire ...................... 440
Computer, Trip/Travel .................... 303
Connector UCI .............................. 352
Universal Consumer Interface (UCI) ....... 352
Conserving Fuel ........................ 320
Console, Floor .......................... 268
Console, Overhead ....................... 248
Contract, Service ........................ 575
Coolant (Antifreeze) ................... 560,561
584 INDEX
