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.
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IF YOU NEED CONSUMER ASSISTANCE 483
Latches................................ 89
Hood ............................. 148
Lead Free Gasoline ...................... 360
Leaks, Fluid ............................ 89
Life of Tires ............................ 348
Light Bulbs .......................... 89,449
Lights .............................. 89,149
Airbag .................... 65,66,71,87,195
Back-Up ........................... 453
Brake Assist Warning .................. 331
Brake Warning ...................... 197
Bulb Replacement .................... 450
Daytime Running .................... 153
Electronic Stability Program (ESP) Indicator . . 331
Engine Temperature Warning ............ 196
Exterior ............................ 89
Fog ......................... 153,202,452
Headlight Switch ..................... 150
Headlights ......................... 150 Headlights On With Wipers
............. 159
High Beam Indicator .................. 207
Illuminated Entry ..................... 20
Instrument Cluster ................... 150
Interior ............................ 155
License ............................ 454
Lights On Reminder .................. 154
Low Fuel .......................... 195
Malfunction Indicator (Check Engine) ...... 205
Map Reading ....................... 155
Oil Pressure ........................ 196
Passing ............................ 153
Seat Belt Reminder ................... 195
Security Alarm (Theft Alarm) ............. 19
Theft Alarm (Security Alarm) ............ 202
Tire Pressure Monitoring (TPMS) .......204,352
Traction Control ..................... 331
Turn Signal .............. 89,152,202,452,453
Voltage ............................ 195
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INDEX 495
