FMVSS1092021用于1949年至1975年制造的车辆的新型充气轮胎斜交轮胎和T型备用轮胎

Nat’lHighwayTrafficSafetyAdmin.,DOT

§571.109

§571.109

49CFRCh.V(10–1–21Edition)

PAGE

497

PAGE

498

Figure21Vibrationtestmachine

Figure22Flasherstandardtestcircuit

[72FR68269,Dec.4,2007,asamendedat76

FR23510,Apr.27,2011;76FR48023,Aug.8,

2011;77FR757,Jan.6,2012;77FR71720,Dec.

4,2012;80FR78669,Dec.17,2015;81FR6458,

Feb.8,2016]

§571.109StandardNo.109;Newpneu-matictiresforvehiclesmanufac-turedfrom1949to1975,biasplytires,andT-typesparetires.

S1.Scope.Thisstandardspecifiestiredimensionsandlaboratorytestre-quirementsforbeadunseatingresist-ance,strength,endurance,andhighspeedperformance;definestireloadratings;andspecifieslabelingrequire-mentsforpassengercartires.

S2.Application.Thisstandardappliestonewpneumaticradialtiresforuseonpassengercarsmanufacturedfrom1949through1975,newpneumaticbiasplytires,andT-typesparetires.How-ever,itdoesnotapplytoanytirethathasbeensoalteredsoastorenderim-possibleitsuse,oritsrepairforuse,asmotorvehicleequipment.

S3.Definitions.

Beadmeansthatpartofthetiremadeofsteelwires,wrappedorrein-forcedbyplycords,thatisshapedtofittherim.

Beadseparationmeansabreakdownofbondbetweencomponentsinthebeadarea.

Biasplytiremeansapneumatictireinwhichtheplycordsthatextendtothebeadsarelaidatalternateanglessubstantiallylessthan90tothecen-terlineofthetread.

Carcassmeansthetirestructure,ex-cepttreadandsidewallrubber.

Chunkingmeansthebreakingawayofpiecesofthetreadorsidewall.

Cordmeansthestrandsformingthepliesinthetire.

Cordseparationmeanscordspartingawayfromadjacentrubbercompounds.Crackingmeansanypartingwithinthetread,sidewall,orinnerlinerofthe

tireextendingtocordmaterial.

Groovemeansthespacebetweentwoadjacenttreadribs.

Innerlinermeansthelayer(s)formingtheinsidesurfaceofatubelesstirethatcontainstheinflatingmediumwithinthetire.

Innerlinerseparationmeansthepart-ingoftheinnerlinerfromcordmate-rialinthecarcass.

Loadratingmeansthemaximumloadatireisratedtocarryforagivenin-flationpressure.

Maximumpermissibleinflationpressuremeansthemaximumcoldinflationpressuretowhichatiremaybein-flated.

Maximumloadratingmeanstheloadratingatthemaximumpermissiblein-flationpressureforthattire.

Opensplicemeansanypartingatanyjunctionoftread,sidewall,orinnerlinerthatextendstocordmate-rial.

Overallwidthmeansthelineardis-tancebetweentheexteriorsoftheside-wallsofaninflatedtire,includingele-vationsduetolabeling,decorations,orprotectivebandsorribs.

Plymeansalayerofrubber-coatedparallelcords.

Plyseparationmeansapartingofrub-bercompoundbetweenadjacentplies.

Pneumatictiremeansamechanicaldevicemadeofrubber,chemicals,fab-ricandsteelorothermaterials,which,whenmountedonanautomotivewheel,providesthetractionandcon-tainsthegasorfluidthatsustainstheload.

Radialplytiremeansapneumatictireinwhichtheplycordswhichex-tendtothebeadsarelaidatsubstan-tially90tothecenterlineofthetread.Rimmeansametalsupportforatireoratireandtubeassemblyuponwhich

thetirebeadsareseated.

Sectionwidthmeansthelineardis-tancebetweentheexteriorsoftheside-wallsofaninflatedtire,excludingele-vationsduetolabeling,decoration,orprotectivebands.

Sidewallmeansthatportionofatirebetweenthetreadandthebead.

Sidewallseparationmeansthepartingoftherubbercompoundfromthecordmaterialinthesidewall.

Testrimmeans,withreferencetoatiretobetested,anyrimthatislistedasappropriateforusewiththattireinaccordancewithS4.4.Forpurposesofthissectionand§571.110,eachrimlist-ingshallincludedimensionalspecifica-tionsandadiagramoftherim.

Treadmeansthatportionofatirethatcomesintocontactwiththeroad.

Treadribmeansatreadsectionrun-ningcircumferentiallyaroundatire.

Treadseparationmeanspullingawayofthetreadfromthetirecarcass.

S4.Requirements.

S4.1Sizeandconstruction.Eachtireshallbedesignedtofiteachrimspeci-fiedforitssizedesignationineachref-erencecitedinthedefinitionoftestriminS3.

S4.2Performancerequirements.

S4.2.1General.Eachtireshallcon-formtoeachofthefollowing:

ItshallmeettherequirementsspecifiedinS4.2.2foritstiresizedes-ignation,type,andmaximumpermis-sibleinflationpressure.

Itsmaximumpermissibleinfla-tionpressureshallbeeither32,36,40,

or60psi,or240,280,300,340,or350kPa.

Itsloadratingshallbethatspeci-fiedinasubmissionmadebyanindi-vidualmanufacturer,pursuanttoS4.4.1(a),orinoneofthepublicationsdescribedinS4.4.1(b)foritssizedes-ignation,typeandeachappropriatein-flationpressure.Ifthemaximumloadratingforaparticulartiresizeisshowninmorethanoneofthepublica-tionsdescribedinS4.4.1(b),eachtireofthatsizedesignationshallhaveamax-imumloadratingthatisnotlessthanthepublishedmaximumloadrating,oriftherearedifferingmaximumloadratingsforthesametiresizedesigna-tion,notlessthanthelowestpublishedmaximumloadrating.

Itshallincorporateatreadwearindicatorthatwillprovideavisualin-dicationthatthetirehasworntoatreaddepthof1.6mm(1⁄16inch).

Itshall,beforebeingsubjectedtoeithertheendurancetestprocedurespecifiedinS5.4orthehighspeedper-formanceprocedurespecifiedinS5.5,exhibitnovisualevidenceoftread,sidewall,ply,cord,innerliner,orbeadseparation,chunking,brokencords,cracking,oropensplices.

ItshallmeettherequirementsofSandSwhentestedonatestwheeldescribedinSeitheraloneorsimultaneouslywithupto5othertires.

S4.2.2Testrequirements.

STestsample.Foreachtestsampleuse:

Onetireforphysicaldimensions,resistancetobeadunseating,andstrength,insequence;

Anothertirefortireendurance;and

Athirdtireforhighspeedper-formance.

SPhysicaldimensions.Theac-tualsectionwidthandoverallwidthforeachtiremeasuredinaccordancewithS5.1,shallnotexceedthesectionwidthspecifiedinasubmissionmadebyanindividualmanufacturer,pursu-anttoS4.4.1(a)orinoneofthepublica-tionsdescribedinS4.4.1(b)foritssizedesignationandtypebymorethan:

(Fortireswithamaximumper-missibleinflationpressureof32,36,or40psi)7percent,or

(Fortireswithamaximumper-missibleinflationpressureof240,280,

300,340or350kPa,or60psi)7percentor10mm(0.4inches),whicheverislarger.

STubelesstireresistancetobeadunseating.

S.1Whenatubelesstirethathasamaximuminflationpressureotherthan420kPa(60psi)istestedinaccordancewithS5.2,theappliedforcerequiredtounseatthetirebeadatthepointofcontactshallbenotlessthan:

6,670N(1,500pounds)fortireswithadesignatedsectionwidthoflessthan160mm(6inches);

8,890N(2,000pounds)fortireswithadesignatedsectionwidthof160mm(6inches)ormorebutlessthan205mm(8inches);

11,120N(2,500pounds)fortireswithadesignatedsectionwidthof205mm(8inches)ormore,usingthesec-tionwidthspecifiedinasubmissionmadebyanindividualmanufacturer,pursuanttoS4.4.1(a),orinoneofthepublicationsdescribedinS4.4.1(b)fortheapplicabletiresizedesignationandtype.

S.2Whenatirethathasamaximuminflationpressureof420kPa(60psi)istestedinaccordancewithS5.2,theappliedforcerequiredtoun-seatthebeadatthepointofcontactshallbenotlessthan:

6,670N(1,500pounds)fortireswithamaximumloadratingoflessthan399kg(880pounds);

8,890N(2,000pounds)fortireswithamaximumloadratingof399kg

(880pounds)ormorebutlessthan635kg(1,400pounds);

11,120N(2,500pounds)fortireswithamaximumloadratingof635kg(1,400pounds)ormore,usingthemax-imumloadratingmarkedontheside-wallofthetire.

STirestrength.EachtireshallmeettherequirementsforminimumbreakingenergyspecifiedinTable1whentestedinaccordancewithS5.3.

STireendurance.Whenthetirehasbeensubjectedtothelabora-toryendurancetestspecifiedinS5.4,usingatestrimthatundergoesnoper-manentdeformationandallowsnolossofairthroughtheportionthatitcom-prisesofthetire-rimpressurechamber:

Thereshallbenovisualevidenceoftread,sidewall,ply,cord,innerliner,orbeadseparation,chunking,brokencords,cracking,oropensplices.

ThetirepressureattheendofthetestshallbenotlessthantheinitialpressuresspecifiedinS.

SHighspeedperformance.WhenthetirehasbeensubjectedtothelaboratoryhighspeedperformancetestspecifiedinS5.5,usingatestrimthatundergoesnopermanentdeformationandallowsnolossofairthroughtheportionthatitcomprisesofthetire-rimpressurechamber,thetireshallmeettherequirementssetforthinS(a)and(b).

S4.3LabelingRequirements.ExceptasprovidedinS4.3.1andS4.3.2ofthisstandard,eachtire,exceptforthosecertifiedtocomplywithS5.5of

§571.139,shallhavepermanentlymold-edintoorontobothsidewalls,inlet-tersandnumeralsnotlessthan0.078incheshigh,theinformationshowninparagraphsS4.3(a)through(g)ofthisstandard.Onatleastonesidewall,theinformationshallbepositionedinanareabetweenthemaximumsectionwidthandbeadofthetire,unlessthemaximumsectionwidthofthetirefallsbetweenthebeadandone-fourthofthedistancefromthebeadtotheshoulderofthetire.Fortireswherethemaximumsectionwidthfallsinthatarea,locateallrequiredlabelingbetweenthebeadandapointone-halfthedistancefromthebeadtotheshoulderofthetire.However,innocaseshalltheinformationbeposi-tionedonthetiresothatitisob-

structedbytheflangeoranyrimdes-ignatedforusewiththattireinStand-ardsNos.109and110(Sec.571.109andSec.571.110ofthispart).

Onesizedesignation,exceptthatequivalentinchandmetricsizedes-ignationsmaybeused;

Maximumpermissibleinflationpressure;

Maximumloadrating;

Thegenericnameofeachcordmaterialusedintheplies(bothside-wallandtreadarea)ofthetire;

Actualnumberofpliesintheside-wall,andtheactualnumberofpliesinthetreadareaifdifferent;

Thewords‘‘tubeless’’or‘‘tubetype’’asapplicable;and

Theword‘‘radial’’ifthetireisaradialplytire.

S4.3.1EachtireshallbelabeledwiththesymbolDOTinthemannerspecifiedinpart574ofthischapter,whichshallconstituteacertificationthatthetireconformstoapplicableFederalmotorvehiclesafetystand-ards.

S4.3.2Eachtireshallbelabeledwiththenameofthemanufacturer,orbrandnameandnumberassignedtothemanufacturerinthemannerspeci-fiedinpart574.

S4.3.3[Reserved]

S4.3.4Ifthemaximuminflationpres-sureofatireis240,280,300,340,or350kPa,then:

EachmarkingofthatinflationpressurepursuanttoS4.3(b)shallbefollowedinparenthesisbytheequiva-lentinflationpressureinpsi,roundedtothenexthigherwholenumber;and

Eachmarkingofthetire’smax-imumloadratingpursuanttoS4.3(c)inkilogramsshallbefollowedinparen-thesisbytheequivalentloadratinginpounds,roundedtothenearestwholenumber.

S4.3.5Ifthemaximuminflationpressureofatireis420kPa(60psi),thetireshallhavepermanentlymoldedintoorontobothsidewalls,inlettersandnumeralsnotlessthan12.7mm(1⁄2inch),thewords‘‘Inflateto420kPa(60psi)’’.Onbothsidewalls,thewordsshallbepositionedinanareabetweenthetireshoulderandthebeadofthetire.However,innocaseshallthewordsbepositionedonthetiresothattheyareobstructedbytheflangeof

anyrimdesignatedforusewiththattireinthisstandardorinStandardNo.110(§571.110ofthispart).

S4.4Tireandrimmatchinginforma-tion.

S4.4.1EachmanufactureroftiresnotcertifiedtocomplywithS4of

§571.139shallensurethatalistingoftherimsthatmaybeusedwitheachtirethatheproducesisprovidedtothepublic.Alistingcompiledinaccord-ancewithparagraph(a)ofS4.4.1ofthisstandardneednotincludedimensionalspecificationsordiagramofarimiftherim’sdimensionalspecificationsanddiagramarecontainedineachlist-ingpublishedinaccordancewithpara-graph(b)ofS4.4.1ofthisstandard.Thelistingshallbeinoneofthefollowingforms:

Listedbymanufacturernameorbrandnameinadocumentfurnishedtodealersofthemanufacturer’stires,toanypersonuponrequest,andindupli-catetotheDocketSection(No:NHTSA–2009–0117),NationalHighwayTrafficSafetyAdministration,WestBuilding,1200NewJerseyAveSE.,

Washington,DC20590;or

Containedinpublications,currentatthedateofmanufactureofthetireoranylaterdate,ofatleastoneofthefollowingorganizations:

TireandRimAssociation

TheEuropeanTyreandRimTechnicalOrganization

JapanAutomobileTyreManufacturersAssociation,Inc.

TyreandRimAssociationofAustraliaAssociacaoLatinoAmericanadePneus

eAros(Brazil)

SouthAfricanBureauofStandards

S4.4.2InformationcontainedinanypublicationspecifiedinS4.4.1(b)ofthisstandardwhichlistsgeneralcategoriesoftiresandrimsbysizedesignation,typeofconstructionand/orintendeduse,shallbeconsideredtobemanufac-turer’sinformationpursuanttoS4.4.1ofthisstandardforthelistedtiresandrims,unlessthepublicationitselforspecificinformationprovidedaccord-ingtoS4.4.1(a)ofthisstandardindi-catesotherwise.

S5.Testprocedures.

S5.1PhysicalDimensions.Determinetirephysicaldimensionsunderuniformambientconditionsasfollows:

Mountthetireonatestrimhav-ingthetestrimwidthspecifiedinasubmissionmadebyanindividualman-ufacturer,pursuanttoS4.4.1(a),orinoneofthepublicationsdescribedinS4.4.1(b)forthattiresizedesignationandinflateittotheapplicablepressurespecifiedinTableII.

Conditionitatambientroomtemperatureforatleast24hours.

Readjustpressuretothatspeci-fiedin(a).

Caliperthesectionwidthandoverallwidthatsixpointsapproxi-matelyequallyspacedaroundthetirecircumference.

Recordtheaverageofthesemeas-urementsasthesectionwidthandoverallwidth,respectively.

Determinetireouterdiameterbymeasuringthemaximumcircum-ferenceofthetireanddividingthisdi-mensionbypi(3.14).

S5.2Tubelesstirebeadunseatingre-sistance.

S5.2.1Preparationoftire-wheelassem-bly.

SWashthetire,dryitatthebeads,andmountitwithoutlubrica-tionoradhesivesonaclean,paintedtestrim.

SInflateittotheapplicablepressurespecifiedinTableIIatambi-entroomtemperature.

SMountthewheelandtireinafixtureshowninFigure1,andforcethebeadunseatingblockshowninFig-ure2orFigure2Aagainstthetireside-wallasrequiredbythegeometryofthefixture.However,intestingatirethathasaninflationpressureof60psi,onlyusethebeadunseatingblockdescribedinFigure2A.

S5.2.2Testprocedure.

SApplyaloadthroughtheblocktothetire’soutersidewallatthedistancespecifiedinFigure1fortheapplicablewheelsizeatarateof50mm(2inches)perminute,withtheloadarmsubstantiallyparalleltothetireandrimassemblyatthetimeofen-gagement.

SIncreasetheloaduntilthebeadunseatsortheapplicablevaluespecifiedinSisreached.

SRepeatthetestatleastfourplacesequallyspacedaroundthetirecircumference.

S5.3Tirestrength.

S5.3.1Preparationoftire.

SMountthetireonatestrimandinflateittotheapplicablepressurespecifiedinTableII.

SConditionitatroomtem-peratureforatleast3hours;and

SReadjustitspressuretothatspecifiedinS.

S5.3.2Testprocedure.

SForcea19mm(3⁄4inch)di-ametercylindricalsteelplungerwithahemisphericalendperpendicularlyintothetreadribasneartothecenterlineaspossible,avoidingpenetrationintothetreadgroove,attherateof50mm(2inches)perminute.

SRecordtheforceandpene-trationatfivetestpointsequallyspacedaroundthecircumferenceofthetire.Ifthetirefailstobreakbeforetheplungerisstoppedbyreachingtherim,recordtheforceandpenetrationastherimisreachedandusethesevaluesinS.

SComputethebreakingen-ergyforeachtestpointbymeansofoneofthetwofollowingformulas:

W=[(FP)/2]103(joules)Where

W=Energy,injoules;

F=Force,Newtons;andP=Penetration,mm;or

W=[(FP)/2]

Where

W=Energy,inch-pounds;F=Force,pounds;and

P=Penetration,inches.

SDeterminethebreakingen-ergyvalueforthetirebycomputingtheaverageofthefivevaluesobtainedinaccordancewithS.

S5.4Tireendurance.

S5.4.1Preparationoftire.

SMountanewtireonatestrimandinflateittotheapplicablepressurespecifiedinTableII.

SConditionthetireassemblyto383C(1005F)foratleastthreehours.

SReadjusttirepressuretothatspecifiedinSimmediatelybeforetesting.

S5.4.2Testprocedure.

SMountthetireandwheelas-semblyonatestaxleandpressitagainstaflat-facedsteeltestwheel1708mm(67.23inches)indiameterand

atleastaswideasthesectionwidthofthetiretobetestedoranapprovedequivalenttestwheel,withtheapplica-bletestloadspecifiedinthetableinSforthetire’ssizedesignation,typeandmaximumpermissibleinfla-tionpressure.

SDuringthetest,theairsur-roundingthetestareashallbe383C(1005F).

SConductthetestat80kilo-metersperhour(km/h)(50milesperhour)inaccordancewiththefollowingschedulewithoutpressureadjustmentorotherinterruptions:

Theloadsforthefollowingperiodsarethespecifiedpercentageofthemaximumloadratingmarkedonthetiresidewall:

Percent

4hours

85

6hours

90

24hours

100

SImmediatelyafterrunningthetiretherequiredtime,measureitsinflationpressure.Allowthetiretocoolforonehour.Thendeflatethetire,removeitfromthetestrim,andin-spectitfortheconditionsspecifiedinS(a).

S5.5Highspeedperformance.

S5.5.1Afterpreparingthetireinac-cordancewithS5.4.1,mountthetireandwheelassemblyinaccordancewithS,andpressitagainstthetestwheelwithaloadof88percentofthetire’smaximumloadratingasmarkedonthetiresidewall.

S5.5.2Breakinthetirebyrunningitfor2hoursat80km/h(50mph).

S5.5.3Allowtocoolto383C(100

5F)andreadjusttheinflationpres-suretotheapplicablepressurespeci-fiedinTableII.

S5.5.4Withoutreadjustinginflationpressure,testat121km/h(75mph)for

30minutes,129km/h(80mph)for30

minutes,and137km/h(85mph)for30minutes.

S5.5.5Immediatelyafterrunningthetiretherequiredtime,measureitsinflationpressure.Allowthetiretocoolforonehour.Thendeflatethetire,removeitfromthetestrim,andin-spectitfortheconditionsspecifiedinS(a).

S6.Nonconformingtires.Notirethatisdesignedforuseonpassengercars

andmanufacturedonorafterOctober1,1972,butdoesnotconformtoalltherequirementsofthisstandard,shallbesold,offeredforsale,introducedorde-

liveredforintroductionintointerstatecommerce,orimportedintotheUnitedStates,foranypurpose.

FIGURESFORFMVSSNO.109

Wheelsize

Dimension‘‘A’’fortireswithmaximuminflationpressure

Otherthan60psi(in)

Otherthan420kPa

60psi(in)

420kPa

20

13.50

345

19

13.00

330

12.00

305

18

12.50

318

11.40

290

17

12.00

305

10.60

269

16

11.50

292

9.90

251

15

11.00

279

9.40

239

14

10.50

267

8.90

226

13

10.00

254

8.40

213

12

9.50

241

11

9.00

229

10

8.50

216

.

320

8.50

216

340

9.00

229

345

9.25

235

365

9.75

248

370

10.00

254

390

11.00

279

415

11.50

292

AppendixA—FederalMotorVehicleSafetyStandardNo.109

Thefollowingtableslisttiresizesandtireconstructionswithproperloadandinflationvalues.Thetablesgrouptiresofrelatedcon-structionsandload/inflationvalues.Persons

requestingtheadditionofnewtiresizestothetablesortheadditionoftablesfornewtireconstructionsmay,whentheadditionsrequestedarecompatiblewithexistentgroupings,orwhenadequatejustificationfornewtablesexists,submitfive(5)copiesofin-formationanddatasupportingtherequestto

theVehicleDynamicsDivision,OfficeofCrashAvoidanceStandards,NationalHigh-wayTrafficSafetyAdministration,400Sev-enthStreetSW.,Washington,DC20590.

Theinformationshouldcontainthefol-lowing:

Thetiresizedesignation,andastate-menteitherthatthetireisanadditiontoacategoryoftireslistedinthetablesorthatitisinanewcategoryforwhichatablehasnotbeendeloped.

Thetiredimensions,includingaspectratio,sizefactor,sectionwidth,overallwidth,andtestrimsize.

Theload-inflationscheduleofthetire.

AstatementastowhetherthetiresizedesignationandloadinflationschedulehasbeencoordinatedwiththeTireandRimAs-sociation,theEuropeanTyreandRimTech-nicalOrganisation,theJapanAutomobileTireManufacturers’Association,Inc.,theDeutscheIndustrieNorm,theBritishStand-ardsInstitution,theScandinavianTireandRimOrganization,andtheTyreandRimAs-sociationofAustralia.

Copiesoftestdatasheetsshowingtestconditions,resultsandconclusionsobtainedforindividualtestsspecifiedin§571.109.

Justificationfortheadditionaltiresizes.

TableI-A—ForBiasPlyTiresWithDesignatedSectionWidthof152mm(6Inches)and

Above

Cordmaterial

32psi

36psi

40psi

240kPa

280kPa

300kPa

340kPa

Rayon:

(in-lbs)

1,650

2,574

3,300

1,650

3,300

1,650

3,300

(joules)

186

291

373

186

373

186

373

Nylonorpolyester:

(in-lbs)

2,600

3,900

5,200

2,600

5,200

2,600

5,200

(joules)

294

441

588

294

588

294

588

TableI-B—ForBiasPlyTiresWithDesignatedSectionWidthBelow152mm(6Inches)

Cordmaterial

32psi

36psi

40psi

240kPa

280kPa

300kPa

340kPA

Rayon:

(in-lbs)

1,000

1,875

2,500

1,000

2,500

1,000

2,500

(joules)

113

212

282

113

282

113

282

Nylonorpolyester:

(in-lbs)

1,950

2,925

3,900

1,950

3,900

1,950

3,900

(joules)

220

330

441

220

441

220

441

TableI–C—ForRadialPlyTires

Sizedesignation

Maximumpermissibleinflation

PSI

kPa

32

36

40

240

280

300

340

350

Below160mm:

(in-lbs)

1,950

2,925

3,900

1,950

3,900

1,950

3,900

1,950

(joules)

220

330

441

220

441

220

441

220

160mmorabove:

(in-lbs)

2,600

3,900

5,200

2,600

5,200

2,600

5,200

2,600

(joules)

294

441

588

294

588

294

588

294

TableI-D—ForTiresWith420kPa(60psi)MaximumPermissibleInflationPressureand

MaximumLoadRating399kg(880lb)andAbove

Cordmaterial

Inch-poundsjoules(J)

Rayon

NylonorPolyester

1,650inchpounds186joules(J).

2,600inchpounds294joules(J).

TableI-E—ForTiresWith420kPa(60psi)MaximumPermissibleInflationPressureand

MaximumLoadRatingBelow399kg(880lb)

Cordmaterial

Inch-poundsjoules(J)

Rayon

NylonorPolyester

1,000inchpounds113joules(J).

1,950inchpounds220joules(J).

§571.110

49CFRCh.V(10–1–21Edition)

PAGE

506

TableII—TestInflationPressures

[Maximumpermissibleinflationpressuretobeusedforthefollowingtest]

Testtype

psi

kPa

32

36

40

60

240

280

300

340

350

PhysicaldimensionsBeadunseating,tirestrength,andtireendurance

Highspeedperformance

24

24

30

28

28

34

32

32

38

60

52

58

180

180

220

220

220

260

180

180

220

220

220

260

180

180

220

Appendixto§571.109

PersonsrequestingtheadditionofnewtiresizesnotincludedinS4.4.1(b)organizationsmay,uponapproval,submitfive(5)copiesofinformationanddatasupportingtherequesttotheVehicleDynamicsDivision,OfficeofCrashAvoidanceStandards,NationalHigh-wayTrafficSafetyAdministration,WestBuilding,1200NewJerseyAve.SE.,Wash-ington,DC20590.

Theinformationshouldcontainthefol-lowing:

Thetiresizedesignation,andastate-menteitherthatthetireisanadditiontoacategoryoftireslistedinthetablesorthatitisinanewcategoryforwhichatablehasnotbeendeveloped.

The