UniformTireQualityGrading
Treadwear
Quality gradescanbefoundwhereapplicable on
thetiresidewall betweentreadshoulder and
maximum section width.Forexample:
Thetreadwear gradeisacomparative rating
basedonthewearrateofthetirewhentested
undercontrolled conditions onaspecified
government testcourse. Forexample, atire
graded150wouldwearoneandahalf(1.5)times
aswellonthegovernment courseasatiregraded
Treadwear200TractionAA
TemperatureA
100.
Therelative performance oftiresdepends
Thefollowing information relates tothesystem
developed bytheUnitedStatesNational Highway
TrafficSafetyAdministration (NHTSA), which
gradestiresbytreadwear,traction, and
temperature performance. Thisapplies onlyto
vehicles soldintheUnitedStates. Thegradesare
moldedonthesidewalls ofmostpassenger car
tires.TheUniform TireQuality Grading (UTQG)
systemdoesnotapplytodeeptread,winter-type
snowtires,space-saver,ortemporary usespare
tires,tireswithnominalrimdiameters of
upontheactualconditions oftheiruse,however,
andmaydepartsignificantly fromthenormdueto
variations indrivinghabits, service practices, and
differences inroadcharacteristics andclimate.
Traction–AA,A,B,C
Thetraction grades,fromhighest tolowest, are
AA,A,B,andC.Thosegradesrepresent thetire's
ability tostoponwetpavement asmeasured
undercontrolled conditions onspecified
government testsurfaces ofasphalt andconcrete.
AtiremarkedCmayhavepoortraction
performance.
10
to12inches(25to30cm),ortosome
limited-production tires.
Whilethetiresavailable onGeneral Motors
passenger carsandlighttrucksmayvarywith
respecttothesegrades, theymustalsoconform
tofederal safetyrequirements andadditional
General MotorsTirePerformance Criteria (TPC)
standards.
6-73
| Categories | Cadillac Manuals, Cadillac STS Manuals |
|---|---|
| Tags | Cadillac STS 3.6, Cadillac STS 4.6 |
| Model Year | 2010 |
| Download File |
|
| Document File Type | |
| Copyright | Attribution Non-commercial |
(0 votes, average: 0 out of 5)
Comments are closed.