2004 Mazda MX 5 Miata Owners Manual

MX-5Miata_8T72-EA-04G_Edition1Page278
Wednesday,June920043:6PM
Blackplate(278,1)
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.
9-14
FormNo.8T72-EA-04G
Product Specification
CategoriesMazda Manuals, Mazda MX-5 Miata Manuals
Model Year2004
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- 296 pages
Document File TypePDF
CopyrightAttribution Non-commercial
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