2007 PORSCHE BOXSTER pressure
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wearoneandahalf(1-1/2)timesaswellonthegovernmentcourseasatiregraded100.Therelativeperformanceoftiresdependsupontheactualconditionsoftheiruse,however,andmaydepartsignificantlyfromthenormduetovariationsindrivinghabits,servicepracticesanddifferencesinroadcharacteristicsandclimate.
TemperatureA,B,C
ThetemperaturegradesareA(thehighest),BandC,representingthetire’sresistancetothegenerationofheatanditsabilitytodissipateheatwhentestedundercontrolledconditionsonaspecifiedindoorlaboratorytestwheel.Sustainedhightemperaturescancausethematerialofthetiretodegenerateandreducetirelife,andexcessivetemperaturecanleadtosuddentirefailure.ThegradeCcorrespondstoalevelofperformancewhichallpassengercartiresmustmeetundertheFederalMotorVehicleSafetyStandardNo.109.GradesBandArepresenthigherlevelsofperformanceonthelaboratorytestwheelthantheminimumrequiredbylaw.
Warning!
Thetemperaturegradeforthistireisestab-lishedforatirethatisproperlyinflatedandnotoverloaded.Excessivespeed,underinfla-tion,orexcessiveloading,eitherseparatelyorincombination,cancauseheatbuildupandpossibletirefailure,resultinglossofcontrol,leadingtoseriouspersonalinjuryordeath.
Tirepressures
Warning!
Incorrecttirepressurecausesincreasedtirewearandadverselyaffectsroadhan-dling.Thiscouldleadtotirefailure,resultinginlossofcontrol,leadingtoseriouspersonalinjuryordeath.
Alwaysuseanaccuratetirepressuregaugewhencheckinginflationpressures.
Donotexceedthemaximumtirepressurelistedonthetiresidewall.
Pleaseobservethechapter”TIREPRESSUREPLATE”onpage297.
Coldtireinflationpressuremeans:alltiresmustbecold,ambienttemperaturemaximum(68°F/20°C),whenadjustingtheinflationpressure.Avoidsunlightstrikingthetiresbeforemeasuringcoldpressures,sincethepressureswouldrisefromtemperatureinfluence.
Valvecapsprotectthevalvefromdustanddirt,andthusfromleakage.Alwaysscrewcapstightlydown.Replacemissingcapsimmediately.
Useonlyplasticvalvecaps.
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Donotusecommerciallyavailablesealantortireinflatingbottles.OnlyusePorscheapprovedtiresealant.
Pleaseobservethechapter”TIREPRESSUREFORCOLDTIRES”onpage304.
Eachtire,includingthespare(ifprovided),shouldbecheckedevery2weekswhencold68°F(20°C)andinflatedtotheinflationpressurerecommendedinthisOwner’sManualoronthetire-pressureplateintheleftdooraperture.IfyourvehiclehastiresofadifferentsizethanthesizeindicatedinthisOwner’sManualoronthetire-pressureplate,youshoulddeterminethepropertireinflationpressureforthosetires.
Asanaddedsafetyfeature,yourvehiclehasbeenequippedwithatirepressuremonitoring(TPC)thatilluminatesalowtirepressuremessagewhenoneormoreofyourtiresissignificantlyunder-inflated.Accordingly,whenthelowtirepressuremessageilluminates,youshouldstopandcheckyourtiresassoonaspossible,andinflatethemtotheproperpressure.Drivingonasignificantlyunder-inflatedtirecausesthetiretooverheatandcanleadtotirefailure.Under-inflationalsoreducesfuelefficiencyandtiretreadlife,andmayaffectthevehicle’shandlingandstoppingability.
PleasenotethattheTPCisnotasubstituteforpropertiremaintenance,anditisthedriver’sresponsibilitytomaintaincorrecttirepressure,evenifunder-inflationhasnotreachedthelevelto
triggerilluminationoftheTPClowtirepressuremessage.
Onvehicleswithtirepressuremonitoring:
Pleaseobservethechapter”TPCTIREPRESSUREMONITORING”onpage119.
Whentiresarewarm,thetirepressureisincreased.
Neverletairoutofhottires.Thiscouldcausethetirepressuretofallbelowtheprescribedvalue.
Insufficienttirefillingpressurecancausetirestooverheatandthusbedamaged-eveninvisibly.Hid-dentiredamageisnoteliminatedbysubsequentlycorrectingthetirepressure.
Overloading
Danger!
Riskofdamagetovehicleparts,lossofcontrolandseriouspersonalinjuryordeath.
Donotoverloadyourvehicle.Becarefulabouttheroofload.
Ifloadingthevehiclealsocorrectthetirepressure.Tirepressureforloadedvehiclecanbefoundonthetirepressureplateandinthechaptertechnicaldata.
Neverexceedthespecifiedaxleload.Over-loadingcanshortentheservicelifeofthetiresandcar,aswellasleadtodangerousvehiclereactionsandlongbrakingdistances.Damageduetooverloadingisnotcoveredbythevehi-clewarranty.
Pleaseobservethechapter”LOADINGINFORMATION”onpage254.
Pleaseobservethechapter”TIREPRESSUREFORCOLDTIRES”onpage304.
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Exampleofatirepressureplate
Tirepressureplate
Informationonthetirepressureplate
ASeatingcapacityMaximumnumberofvehicleoccupants,includingthedriver.
BVehicleloadlimitIsthemaximumtotalweightlimitspecifiedoftheload(passengersandcargo)forthevehicle.Thisisthemaximumweightofpassengersandcargothatcanbeloadedintothevehicle.Pleaseobservethechapter”LOADINGINFORMATION”onpage254.
CTiresizeforthefrontaxleCheckwithyourauthorizedPorschedealeraboutthecurrentreleasestatus.
DRecommendedtirepressureforthefrontaxleThesevaluesareforcoldtires(68°F/20°C).
ETiresizefortherearaxleCheckwithyourauthorizedPorschedealeraboutthecurrentreleasestatus.
FRecommendedtirepressurefortherearaxleThesevaluesareforcoldtires(68°F/20°C).
GInvehicleswithcollapsiblesparewheel:Sizeandtirepressureofthesparewheel.
Tiretraction
Warning!
Whendrivingonwetorslushyroads,awedgeofwatermaybuildupbetweenthetiresandtheroad.Thisphenomenonisknownas“hydroplane”andmaycausepartialorcompletelossoftraction,vehiclecontrolorstoppingability.
Reducespeedonwetsurfacetopreventthis.
Tirelife
Tirelifedependsonvariousfactors,i.e.,roadsurfaces,trafficandweatherconditions,drivinghabits,typeoftiresandtirecare.
Inspectyourtiresforwearanddamagebeforedrivingoff.Ifyounoticeunevenorsubstantialwear,wheelsmightneedalignmentortiresshouldbebalancedorreplaced.
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Tirewear
TheoriginalequipmenttiresonyourPorschehavebuilt-intirewearindicators.Theyaremoldedintothebottomofthetreadgroovesandwillappearasapproximately1/2in.(12mm)bandswhenthetiretreaddepthisdownto1/16ofanin.(1.6mm).
Whentheindicatorsappearintwoormoreadjacentgrooves,itistimetoreplacethetires.Werecommend,however,thatyoudonotletthetiresweardowntothisextent.Worntirescannotgriptheroadsurfaceproperlyandareevenlesseffectiveonwetroads.
IntheUnitedStates,statelawsmaygoverntheminimumtreaddepthpermissible.Followallsuchlaws.
Danger!
Drivingonworntirescanresultinlossofcontrolofthevehicleandcouldcauseseriouspersonalinjuriesordeath.
Donotdrivewithworntiresortiresshowingcutsorbruisesastheymayleadtosuddendeflationandlossofcontrolwhichcouldcauseseverepersonalinjury.
Specializedhighperformancetiresonhighperformancesportscarsexhibitmorewearthanthoseonafamilysedan,orevenahighperformancesedan.Therefore,itisimportanttocheckyourtirepressureandconditionatleasteverytwoweeks.
Ifyounoticethattiresarewearingunevenly,consultyourPorschedealer.Unevenwearmaynotalwaysbeduetoimproperwheelalignment.Itcanbetheresultofindividualdrivinghabitssuchascorneringathighspeeds.Ifthetirepressureisnotcheckedandadjustedregularly,abnormaltirewearcanalsooccur.
Tirecare
Avoiddamagingtiresandwheelrims.
Ifyoumustdriveoveracurborotherobstacle,driveslowlyandatanobtuseangle.
Checktiresforunevenwearanddamagebeforedrivingoff.
Removeimbeddedmaterial.
Replacewornordamagedtiresimmediately.
Keepoil,fuel,brakefluid,etc.awayfromtires.
Replacemissingvalvestemcaps.
Keeptiresinflatedcorrectly.
Washtireswhenwashingthevehicle.Alsocleaninnersideofwheels.
Donotuseabrasivecleanerswhenwashingthewheels.
Checkwheelrimsforcorrosion.
Removeroadsalt,ifdrivinginwinter.
Tiredamage,puncture
Checktiresforimbeddedmaterial,cuts,punctures,cracksandbulges(sidewall)beforedrivingoff.
Incaseoftiredamage,whereitisuncertainwhetherthereisabreakintheplywithallitsconsequencesortiredamagecausedbythermalormechanicaloverloadingduetolossofpressureoranyotherpriordamage,werecommendthatthetirebereplacedforsafetyreasons.
Ifonefaultytireisreplaceditshouldbenotedthatthedifferenceintreaddepthononeaxlemustnotexceed30%.Handlinginconsistenciesmayresult.
Performavisualinspectionifnecessary.
Danger!
Riskofseriouspersonalinjuryordeath.Drivingthevehiclewithlowtirepressureincreasesriskofatirefailureandresultinglossofcontrol.Furthermore,lowtirepressureincreasesrateofwearoftheaffectedtires.
Checktires-includingsidewalls-regularlyforforeignbodies,nicks,cuts,cracksandbulges.
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Ifyoumustdriveoveracurborotherobstacle,driveslowlyandatanobtuseangle.Exercisecarewhenparkingalongcurbs.
Wheelalignment,wheelbalancing
Asaprecaution,havewheelswithsummertiresbalancedinthespring,andthosewithmudandsnowtiresbeforewinter.Unbalancedwheelsmayaffectcarhandlingandtirelife.Onlythespecifiedweightsmaybeusedforwheelbalancing.Self-adhesiveweightsmustnotcomeintocontactwithcleaningagents,sincetheycoulddropoff.Uneventreadwearindicateswheelimbalance.Inthisevent,thevehicleshouldbecheckedatanauthorizedPorschedealer.
Warning!
If,duringatrip,unevenrunningorvibrationsoccurthatcouldbecausedbydamagetotiresorthecar,thespeedmustbereducedimmediately,butwithoutbrakingsharply.Ifyoucontinueyourtripwithouthavingthecauseofthefaultremedied,youmightlosecontrolofyourvehiclewhichcouldcauseseriouspersonalinjuryordeath.
Stopthevehicleandcheckthetires.
Ifnocauseforthefaultcanbefound,drivecarefullytothenearestauthorizedPorschedealer.
Removingandstoringtires
Afterchanging,adjusttirepressureandtorquewheelboltsdiagonallyto94ft.lb.(130Nm).
Tiresmustalwaysremainonthesamesideofthevehicle.Whenwheelsareremoved,thedirectionofrotationandpositionofeachwheelshouldbemarked.
Example
FR(frontright),FL,RRandRL.
Wheelsmustalwaysbefittedinaccordancewiththeirmarking.
Theperceptionthattiredurabilityandperformanceareimmunetotheeffectsofstorageandageisunfounded.Chemicaladditives,whichmaketherubberelastic,losetheireffectivenessinthecourseoftimeandtherubberbecomesbrittleandcracks.
Therefore,thetiresshouldbeinspectedfromtimetotime.
Note
Undernocircumstancesshouldtiresolderthan6yearsbeusedonyourPorsche.
Theageofthetirecanbeobtainedfromthe“DOT”codenumber.If,forexample,thelastfournumbersread0706,thenthetirewasproducedinthe7thweekof2006.
Storetiresinacoolanddryplace.
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–fourthfour-digitcodemeansdateofmanu-facture.If,forexample,thelastfournumbersread0204,thetirewasproducedinthe2ndweekof2004.
CTireplycompositionandmaterial
Thenumberoflayersinthetreadandsidewallsandtheirmaterialcomposition.
DMaximumpermissibleinationpressure
Themaximumpermissiblecoldinflationpressuretowhichatirecanbeinflated.
Donotexceedthepermissibleinflationpressure.
EMaximumLoadrating
Themaximumloadinkilogramsandpoundscanbecarriedbythetire.Ifyoureplacetiresalwaysuseatirethathasthesamemaximumloadratingasthefactoryinstalledtire.
FRadial
Theidentificationindicatesifthetirehasradialstructure.
GTermoftubelessortubetire
Identificationfortubelesstires.
Speedcodeletter
Thespeedcodeletterindicatesthemaximumpermissiblespeedforthetire.Thiscodeletterisshownonthetiresidewall.
T=upto118mph(190km/h)
H=upto131mph(210km/h)
V=upto150mph(240km/h)
W=upto167mph(270km/h)
Y=upto186mph(300km/h)
Tipondriving
TireswithamaximumspeedratingthatislowerthanthespecifiedmaximumvehiclespeedmaybemountedonlyiftheybearanM+Sidentificationonthetiresidewall.
Pleasenotethatinadditiontothewintertires,all-seasonandall-terraintiresarealsosubjecttospeedlimitsandbearthisidentification.
Inscriptiononlightalloywheels
Maintenancenote
Protectthevalveinsertsagainstsoilingwithvalvecaps.Useonlyplasticvalvecaps.Soiledvalveinsertscancauseagraduallossofair.
A-RimwidthininchesB-Rim-angecontourcodeletterC-Symbolfordrop-centerrimD-RimdiameterininchesE-DoublehumpF-Rimoffsetinmm
Noteonoperation
TherimwidthininchesAandtherimoffsetFarevisiblefromtheoutside.Thisinformationcanbefoundnearthetirevalve.
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LoadingInformation
Denitions
TheCurbweight-actualweightofyourvehicle-vehicleweightincludingstandardandoptionalequipment,fluidsandemergencytools.Thisweightdoesnotincludepassengersandcargo.
TheGrossVehicleWeightissumofthecurbweightandtheweightofpassengersandcargocombined.
TheGrossVehicleWeightRatingisthemaxi-mumtotalweightofvehicle,passengers,luggageandoptionalequipment.
TheGrossAxleWeightRatingisthemaximumloadlimitforthefrontortherearaxle.Thisinformationislocatedonthesafetycompliancestickerlocatedinthedriver’ssidedoorjamb.
Fordeterminingthecompatibilityofthetireandvehicleloadcapabilities:
Pleaseobservethechapter”TIRES,RIMS,TRACKS”onpage301.
Theloadcapacitycoefficient(e.g.“101”)isaminimumrequirement.
TheGrossCombinedWeightRatingisthemaxi-mumtotalweightratingofvehicle,passengersandcargo.
TheVehicleCapacityWeight-LoadLimit-isthemaximumtotalweightlimitspecifiedoftheload(passengersandcargo)forthevehicle.Thisisthe
maximumweightofpassengersandcargothatcanbeloadedintothevehicle.Thisinformationcanbefoundonthetirepressureplate.
Themaximumloadedvehicleweightisthesumofcurbweight,accessoryweight,vehiclecapacityweightandproductionoptionsweight.
Theloadratingisthemaximumloadthatatireisratedtocarryforagiveninflationpressure.
Themaximumloadratingistheloadratingforatireatthemaximumpermissbleinflationpressure.
Thecargocapacityisthepermissibleweightofcargo,thesubtractedweightofpassengersfromtheloadlimit.
Neverexceedthepermissiblelimits.
Danger!
Riskoflossofcontrol,damagetovehicleandseriouspersonalinjuryordeath.
Neverexceedthespecifiedaxleloads.Overloadingcanshortentheservicelifeofthetiresandcar,aswellasleadtodangerousvehiclereactionsandlongbrakingdistances.Damageduetooverloadingisnotcoveredbythevehiclewarranty.
Examplefordeterminingthecombinedweightofoccupantsandcargo
VehicleLoadCapacity
Thecombinedweightofoccupantsandcargoshouldneverexceedtheweightshownonthetireplateinthevehicle.
Pleaseobservethechapter”TIREPRESSUREPLATE”onpage297.
Neverexceedthenumberofpassengersshownonthetirepressureplateinthevehicle.
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FlatTire
Generalinformation
Warning!
Failuretofollowtheseinstructionsmayresultinseriouspersonalinjuryordeathtoyouortobystanders.
Ifyouhaveaflattire,moveasafedistanceofftheroad.Turntheemergencyflasheronanduseotherwarningdevicestoalertothermotorists.Settheparkingbrake.
Donotparkyourvehiclewhereitmaycontactdrygrass,brushorotherflammablematerials.Thehotpartsoftheexhaustsystemcouldsetsuchmaterialsonfire,therebycausingbothpropertydamageandseriouspersonalinjuryordeath.
Atiresealantandcompressorwithpressuretesterarelocatedinthetoolboxintheluggagecompartment.
PleaseobservethesafetyandoperatinginstructionsonthespecialsealantbottlewithaspecialPorschepartnumberandonthecompressor-theseareessential.
Caution!
Sealingthetirewiththetirerepairkitisonlyanemergencyrepair.Evenwiththetireair-tight,itmaybeusedonlyforshorttripsinanemergency.Themaximumpermittedspeedis50mph(80km/h).
Donotusecommerciallyavailablesealantortireinflatingbottles.Useonlythetiresealantlocatedintheluggagecompartment.
Warning!
Riskofaccidentresultinginseriouspersonalinjuryordeath.
Havetiresreplacedbyaspecialistworkshopassoonaspossible.
Avoidhardaccelerationandhighcorneringspeeds.
A-FillerbottleB-Fillerhose
Tiresealant
Usage
Thetiresealantcanbeusedtosealsmallcuts,especiallyinthetiretread.
Sealingthetirewiththetiresealantisonlyanemergencyrepair,soyoucandrivetothenextworkshop.Evenwiththetireair-tight,itmaybeusedonlyforshorttripsinanemergency.
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