CustomerInformationandReportingSafetyDefects
UniformTireQualityGradingSystem(UTQGS)
UniformTireQualityGradingSystem(UTQGS)
ThisinformationrelatestothetiregradingsystemdevelopedbytheU.S.National
HighwayTrafficSafetyAdministrationforgradingtiresbytreadwear,traction,and
temperatureperformance.
qTreadWear
Thetreadweargradeisacomparativeratingbasedonthewearrateofthetirewhentested
undercontrolledconditionsonaspecifiedgovernmenttestcourse.
Forexample,atiregraded150wouldwearone-and-a-halftimesaswellonthegovernment
courseasatiregraded100.
Therelativeperformanceoftiresdependsupontheactualconditionsoftheiruse,however,
andmaydepartsignificantlyfromthenormbecauseofvariationsindrivinghabits,service
practicesanddifferencesinroadcharacteristicsandclimate.
qTraction-AA,A,B,C
Thetractiongrades,fromhighesttolowest,areAA,A,B,andC.Thesegradesrepresent
thetire'sabilitytostoponwetpavementasmeasuredundercontrolledconditionson
specifiedgovernmenttestsurfacesofasphaltandconcrete.AtiremarkedCmayhavepoor
tractionperformance.
WARNING
Thetractiongradeassignedtothistireisbasedonbraking(straightahead)traction
testsanddoesnotincludeaccelerationcornering(turning),hydroplaning,orpeak
tractioncharacteristics.
qTemperature-A,B,C
ThetemperaturegradesA(thehighest),B,andC,representthetire'sresistancetothe
generationofheatanditsabilitytodissipateheatwhentestedundercontrolledconditions
onaspecifiedindoorlaboratorytestwheel.
Sustainedhightemperaturecancausethematerialofthetiretodegenerateandreducetire
life,andexcessivetemperaturescanleadtosuddentirefailure.
GradeCcorrespondstoalevelofperformancewhichallpassengervehicletiresmustmeet
undertheFederalMotorVehicleSafetyStandardNo.109.GradesBandArepresent
higherlevelsofperformanceonthelaboratorytestwheelthantheminimumrequiredby
law.
9-21
| Categories | Mazda 3 Manuals |
|---|---|
| Model Year | 2009 |
| Download File |
|
| Document File Type | |
| Copyright | Attribution Non-commercial |
(0 votes, average: 0 out of 5)