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 435
9
Cargo Load Floor........................ 162
Cargo Slide Out System
LoadNGo .......................... 163
Cargo Tie-Downs........................ 160
Cargo (Vehicle Loading)................... 334
Cellular Phone.......................... 86
Center High Mounted Stop Light............ 407
Certification Label....................... 334
Changing A Flat Tire..................... 356
Charging.............................. 362
Chart, Tire Sizing........................ 298
Check Engine Light (Malfunction
Indicator Light)......................186,370
Checks, Safety.........................76,77
Child Restraint....................65,66,71,73
Child Restraint Tether Anchors.............69,71
Child Safety Locks........................ 31
Climate Control......................... 248
Clock........................202,216,220,229Coin Holder........................... 159
Compact Disc (CD) Maintenance............. 247
Compact Spare Tire...................... 308
Compass........................187,190,195
Compass Calibration..................190,196
Compass Variance....................189,197
Computer, Trip/Travel.................... 194
Console.............................. 159
Console, Floor.......................... 159
Contract, Service........................ 431
Cooling System......................... 382
Adding Coolant (Antifreeze).............. 384
Coolant Capacity...................... 408
Coolant Level......................... 386
Disposal of Used Coolant................ 386
Drain, Flush, and Refill.................. 383
Inspection........................... 383
Points to Remember.................... 387
Pressure Cap......................... 385
440 INDEX
