Bsi bs au 050 1 2 1b 2001 (iso 4209 1 2001)

BRITISH STANDARD AUTOMOBILE SERIES BS AU 50 1 2 1b 2001 ISO 4209 1 2001 Incorporating Corrigendum No 1 Truck and bus tyres and rims (metric series) — Part 1 Tyres ICS 83 160 10 NO COPYING WITHOUT BS I[.]

BRITISH STANDA RD AUTOMOBILE SERIES

50- 1.2.1b:2001

ISO

Incor por a ting

Cor r igend um No 1

This Br itsh Stan ard,ha ing

b en pre ared u d er the

directon of the Engine ring

Sector Policy an Strateg y

Commi e , was published

u der the authoriy of the

Stan ard s Policy n Strateg y

Commi e on

2 Se temb r2 0

© BSI 0 Oct ob r2 0

ISBN 0 5 0 3 5 4 3

Th is British Stand r d reproduces verb tim ISO 420 -1:20 1 an d implements

it as the UK national stand ard It super edes BS AU 5 -1.2.1a:19 5 which is

withdrawn

The UK p rticip tion in its prep ration was entrusted to Tech ical Commit e

AUE/ 4, Ty res and whe ls for motor v ehicles, which has the responsibi ity to:

A lst of org anizations represented on this commit e can be obtained on

req uest to its sec etary

Cros -referenc s

Th e British Stand r ds which implement international o Eur opean

publcations refer red to in this document ma be found in the BSI Stand rds

Catalogue u der the section entitled “ nter national Stand rds Cor espond ence

Index”, or b using the “F ind” faci ity of the BSI Stand rds Electr onic

Catalog ue

A British Stand rd do s not purport to include al the neces ary prov isions of

a contract User of British Stand rds are responsible for their cor ect

a pl cation

Com pl a nc with a British Standard does not of itself confer im m unity

f om leg al o l g ations

— aid enq uir er to u der tand the tex t;

— present to the responsible international/ European commit e any

enq uiries on the interpretation , or proposals for change, and ke p the

UK interests informed ;

— monitor r elated international and Eur opean dev elopments and

promulg ate them in the UK

Sum m ary ofpag es

This document comprises a f ont cov er, an insid e font cov er, the ISO title

p ge p ges i to iv , p ges 1 to 19 and a b ck cover

The BSI copy right d te d isplay ed in th is document indicates when the

document was last is ued

Am endm ents is ued sinc publ cation

DPFdlc iremia

ihTsPDFfiemy ctn a inemd d e ty fe c e na c n dr oewithA'e o slc e ig lo ic,ythisfiema b pir ntd r oivw ed tu sla lto

e id te ln e ste tyfe a cs whic a remd d e er alc e e tod aintslale o te c mp tr efr ep rmin te id tig nw odlnid o nthis

f,el tr apie acc pt nier ehte s rs o ti biyof o nifr gnig iAs'e o lc n g i lo c e TISOtn ClarSe tera irta cc ptsn l b itynithis

.a r a

Ae o isate arma rfoAe o Sts emsIc tar opr o.d

teDaisfoth sfotwer ap u orts u etocr ta etih P Dfiec nb fd u inth Glar en Infoleratie toth fi;eth Pc-FDa rtio ar apmter es

weretp imiz eforpirtnin Ev yr ec r as hn e tak entoe s r uta t e f ileiss itlb efr os eb ISOmemr ebid b.s Inte ln ik le etn v

ta aplb remlera tig toitisf,d u lp a eif nr omte tn ClarSc terair a ta tth s er dd giv nele w o

© ISO10 2

A llr hgitsr se r e.d elnUs tow r ehis s e fid i o tr apof ih cib pta noimy e c d r perd r outzi d niy aformr oy y as a m, e lctin rc

r ome in h al in ld g to p ciy o gd amicr foim, witu hr epmis in inwr itin formeitr ehISOat e er dda ssle w or oISO'smemr eby o

ISO 4 0 -1:2 01(E)

Foreword .v

1 Sc pe 1

2 Normativ refere c 1

3 Termsa dd finitio s 1

4 Tyred sig ation 1

4.1 Co te t 1

4.2 Sizea dc nstru tio 2

4.2.1 Mark ing 2

4.2.2 Nominals ctio width 2

4.2.3 Nominala pe tratio .2

4.2.4 Ty rec n tru tio c d 2

4.2.5 Nominalrim diameter 2

4.3 Servic c n itionc ara teristic 2

4.3.1 Mark ing 2

4.3.2 Lo din e 3

4.3.3 Spe dsy mbol 3

4.4 Oth rs rvic c ara teristic 3

4.5 Ex mple .3

5 Tyredime sio s 4

5.1 Calc lationof"de ig "tyredime sio s .4

5.1.1 Co ficie ts .4

5.1.2 The retic lrim width,R th 4

5.1.3 Me s rin rim width,R 4

5.1.4 De ig tyres ctio width,S .4

5.1.5 De ig tyres ctio heig t, H 4

5.1.6 De ig ty reo eral diameter,D o 4

5.1.7 Value 5

5.2 Calc lationof"ma imumov ral tyredime sio sin s rvic " 5

5.2.1 Ma imumov ral widthins rvic , W ma 5

5.2.2 Ma imum o eral diameterins rvic ,D o,ma 5

5.3 Minimumd alspa in (MDS) 5

5.4 Appro e rim width 7

6 Tyredime sio table 8

7 Meth d ofme s reme toftyredime sio s .8

8 Servic c ara teristic 8

8.1 Tyrelo d-c r y in c pa ity 8

8.2 Spe dsymbol 8

8.3 Lo d-c r y ingc pa ityatv riou spe ds 9

Ann xA(infor mative) Guid lnev lu sformetrics rie ,5°rims .12

Ann xB(infor mative) Guid lnev lu sformetrics rie ,15°rims 15

Ann xC(infor mative) Tyredime sio table 19

ISO (heInternationalOr ganization forStan ar dization)isaworldwidefederationofnational stan ard b dies(ISO

memb r b dies) The work of pre arin International Stan ard is normaly caried out throu h ISO tec nical

commite s Eac memb rb d inter ested in as bject orw hic atec nical commite hasb en esta ls ed has

therig t ob re resented on thatcommite nternational or ganization , gov ernmental an non-gover nmental, in

laison with ISO, also take p rt in the w ork ISO cola or ates closely with the International Electrotec nical

Commis ion(IEC)on al matersofelectrotec nicalstan ar dization

InternationalStan ard aredrafedinac ordan ewith therulesgiv enintheISO/ IECDirectives, Part3

Draf Inter national Stan ard ado ted bythetec nical commite sarecirc lated to the memb rb diesforvotin

Publcation asan International Stan ar d req iresa proval byatle st7 %of hememb rb diescastin av ote

Atention isdraw n tothep s ibi tythatsomeof heelementsof hisp r tofISO4 0 mayb thes bjectofp tent

rig ts SOs al notb held resp n ibleforidentifyin an oral s c p tentrig ts

International Stan ar d ISO4 0 -1 w as pre ar ed by Tec nical Commite ISO/TC31, Tyres, rims and valv s,

Subcommite SC4,Truckandb styresandrims

Thissixth editioncan elsan re lacesthefifh edition(ISO4 0 -1:19 3), w hic hasb en tec nicalyrev ised

ISO4 0 con istsof hefolow in p rts,u derthegeneral titleTruckandb styresandrims(metricseries):

INTERNAT IONALSTANDARD ISO 4 0 -1:2 01(E)

Par t 1:

Ty res

Thisp rtofISO4 0 sp cifies the desig ation, dimen ion an lo d r atin sof hemetric series of tyres primariy

inten ed fortru k an bu es

Itis a plca letobias-b lted, diagonal an radial ty res for tru k an bu es, mou ted on 5°ta ered rims an on

15°ta er ed (dro -centre) r ims

It is also a plca le to diferent con e ts an ty pes of ty r es an rims; in these cases, how ev er, a pro riate

r im/section ratiosK

1, K

4,co ficientsK

2, K

3, C

R

an con tru tioncodeshav eb en ad ed toTa les3,4an 5

ISO4 0 -2de lsw ith r eq irementsforr ims

Thefolow in nor mativedoc mentcontain provision whic ,throu h referen einthistext, con tituteprovision of

thisp rtofISO4 0 Fordated referen es, s bseq entamen ments to, orr evision of, an of thesepublcation

do not a ply How ev er, p r ties to agre ments b sed on this p r t of ISO4 0 are en ouraged to in estigate the

p s ibi tyofa ply in themostrecentedition of henor mativedoc mentin icated b low Foru dated r eferen es,

the latest edition of the nor mative doc ment refer red to a ples Memb rs of ISO an IEC maintain registers of

c rentlyvaldInternationalStan ard

ISO4 2 -1:—

1

Defini o sofsometermsusedinth tyreindustry—Part1:Pn umatictyres

Forthepurp sesof hisp rtofISO4 0 ,thetermsan definition giv en inISO4 2 -1 a ply

4 Ty re designation

4.1 Conte t

The desig ation of the tyre s al b s ow n on its sidew al an s al in lu e the folow in mar kin s, to b s own

closetoe c other:

¾ sizean con tru tion(se 4.2);

¾ ser v icecon ition c aracter i tic (se 4.3)

4.2 Sizea d c nstruction

4.2.1 Mark in

Thesizean con tr uctionc aracteristic s al b in icatedasfolow s:

4.2.2 Nomin ls ctio width

Thenominalsection width s al b expres edin mi metres

Forty r esfitedto5°ta er imsan fortyresfited to15°ta er ims,thenominal tyresection width s al en in 5

4.2.3 Nomin la pe t ratio

Thenominalasp ctratios al b expres ed asap rcentagean s al b amultipleof5

4.2.4 Ty rec n tructio c d

Thetyrecon tru tioncodes al b asfolow s:

B forbias-b ltedcon tru tion;

D, or –,fordiagonal/biascon tru tion;

R forradialcon tru tion

NOT E Oth rco eswil b est ablsh dforn wtyreco ce ts(co structio s)

4.2.5 Nomin lrim diameter

Thenominal rim diameterfor5°ta ered b ad se t rimsan for15°ta er ed b ad se t dro -centre) rims s al b

expres ed byacode(se Ta le1 forcodecorelation)

NOT E 15°ta ere r imsaretob use o lyfortyr esw ithlo din ex12 a dlarg r

How ev er, its al b expr es ed in mi imetresfornewan futur econ e ts wherethemou tin ofexistin ty reson

newcon e trimsorofnewcon e t y resonexistin rimsw ouldb in omp tible

4.3 Serv ic c ndition c ara teristic

ISO 4 0 -1:2 01(E)

4.3.2 Lo din e

Thelo din exisan mericalcodeas ociated w ith themaximum lo daty recan caryat hesp ed in icatedbyits

sp ed s mb l u dertheservicecon ition sp cified bythety reman factur er.Se Ta le6

4.3.3 S e d sy mbol

Thesp ed s mb l n icates thesp ed atwhic thety r e can car ry the lo d coresp n in to its lo d in ex u der

theservicecon ition sp cified bythetyreman factur er Se Ta le7

4.4 Otherserv ic c ara ter istic

4.4.1 In thecaseof ub les ty res,themarkin “TUBELESS”s al b s ownonthety r e

4.4.2 In thecaseofaprefer red direction ofr otationof hety r e,anar ows al b u edtoin icatethatdirection

4.4.3 In thecaseofsp cialtre dty res(se Ta le3), thes mb l“ET”s al b s ow nonthetyre

Atyrehavin

a) asizean con tru tion of:

¾ nominalsectionwidth2 5mm,

¾ nominal asp ctr atio7 %,

¾ r adial con tr uction,

¾ nominal rim diametercode2 5;

b) serv icecon ition c aracter i tic of:

5 Ty re dimensions

5.1 Calc lation of"de ign"tyredime sions

5.1.1 Co ficie ts

For the c oice of co ficients K

1(he retical r im/section r atio), K

2

4(me s r i g rim/section ratio), se

N, an the the retical

rim/sectionr atio, K

1:

4:

R =K

4

S

N

rou dedtothene r eststan ardizedr im w idth (se Ta le2)

5.1.4 De igntyres ctio width,S

The desig ty re section w idth, S , is the nominal section width, S

N, tran fer red from the the retical rim, R

th)

rou ded tothene restw holen mb r

5.1.5 De igntyres ctio h ig t, H

Thedesig ty r e section heig t,H, is eq al totheprod ctof henominal section w idth, S

N, an thenominal asp ct

ratio, H/S(H/Sexpr es ed asap rcentage):

r, plu twicethedesig tyresection

ISO 4 0 -1:2 01(E)

5.1.7 Valu s

The r elevant dimen ion (me s rin r im w idth, desig section w idth an desig section heig t ar e s ow n in

an exesAan B Forty resofagiv en ser ies, with anominal tyresection over2 5, itisrecommen ed that heyb

in in rementslar gerthan10

5.2 Calc lationof"max imum ov eral tyredime sionsin s rv ice"

Thesecalc lation areforu ebyvehicleman factur ersindesig in fortyrecle ran es

5.2.1 Ma imum o eral widthins rvic ,W

ma

Themaximum ov er al w idth in serv ice, W

ma, is eq al to the prod ct of the desig tyre section w idth, S , an the

a pr opriateco ficient,a(se Ta le3):

W

ma

=S a

Itin lu esprotectiver ibs,leterin ,emb l s ments, man facturin toleran esan grow th d etoservice

5.2.2 Ma imum o eral diameterin s rvic ,D

o,ma

Themaximum overal diameterinserv ice,D

o,ma, iseq altothenominal r im diameter,D

Itin lu esman facturin toleran es,thedifer ent y pesof re d p tern an growth d etoserv ice

5.3 Minimum dual s acing (MDS)

5.3.1 Theminimum d al sp cin isag idelnevalueeq al totheprod ctof hedesig tyresection w idth, S , an

thea pro r iateco ficient, K

3(se Ta le4):

MDS=S K

3

Itis refer red to a ty re lo d ac or din to the lo d in ex, in d al a plcation s ow n in the ser vice c ar acteristic on

thetyreatan inflationpres urea plca lefornormalhig w ayserv ice

5.3.2 Thedesig ty resection w idth,S , w il c an e2,5mm fore c 0.2 c an einrim w idth code.Theminimum

d alsp cin s al b adju tedac ordin ly

Table1 —Nomin lrim diameterc d s Table2—Rim widthc d s

ISO 4 0 -1:2 01(E)

Table3—Co ficie tsK

2,b,aforc lc latio oftyredime sio s

Stru ture Tyrecon tru tion

3, K

4forc lc latio ofty redime sio s

a

ForH/Slowerth n5 or4 r es e tiv ly,fur th rc e icie tswi b e ta ls e

NOT Oth rfa ctorsma b e ta ls e forn wtyr ec n e ts(c n tr uctio s)

5.4 Approv ed rimwidths

Theran eofa pr ov ed rim w idth , in mi imetres, isdetermined, fore c nominal section width, by multiplyin the

nominal sectionwidth, S

N,bytheco ficients, C

R,presentedin Ta le5,i.e

¾ minimum rim w idth:C

Thev alueso taineds al b r ou dedtothene reststan ardizedrimw idthinTa le2

Table5—Co ficie tsforc lc lationofrim width

Typeofrim Nomin la pe t

ratio

H/S

Coeficie tsforc lc lationof

ap rov edrimwidth

a

Oth rc eficie tsma b s e if ie inr ela tio tos e ia ls r v ic sb a r eeme t

amo gtyr e,r im,whe la dmotorv ehiclema ufa ctur er s

b

For H/S lower th n 5 a d 4 r es e tiv ely, fur th r c e icie ts wi b

e ta ls e

6 Ty re dimension tables

Examplesofafewsizesinaty redimen ion ta lear egiven in An exC Thefig r ess ow n in thecolumn he ded

"Rim"arecodesrelated tome s r i g rim width,R (se Ta le2forcodecorelation)

7 Method ofmea urement oftyre dimensions

Before me s rin , tyres s al b mou ted on the me s r i g rim, inflated to the recommen ed pres ure, an

alow ed to stan for a minimum of 2 h at normal ro m temp rature, afer w hic the inflation pres ure s al b

re dju tedtotheoriginal value

8 Serv ice characteristics

ISO 4 0 -1:2 01(E)

8.3 Loa -c r ying c pa ityatv ariouss e ds

When the tyre is fited on a vehicle with a maximum sp ed ca a i ty diferent fr om the tyre referen e sp ed,

v ariation oflo d ar egrantedinr elationtothelo d coresp n in tothelo d in ex(se Ta les8an 9) Too tain

impr oved o eratin p rfor man eu derthesecon ition , inflation pres ureshig erthan theb sicpres ur emayb

Table7—Cor elatio betwe n spe ds mbol

Table8—Loa -c r y in c pa itie at v rio sspe d —

Ty re withloa ind x(sin le)u121 a dspe dsymbol Ja dabov

NOT 1 Th infla tio pr es ur es al b in r ea e forlo da ju tme tsa o e12 %orfors e d a o e16 k m/hinc n ultatio with

th tyr ema ufa tur er

NOT 2 L a a ju tme tsar ev ldforu eo impr ov ed ur fa eo ly

NOT 3 Co s ltr ima dwh elma ufa tur er sforc nfirma tio of h str en thof h r im/wh elforth inte d ds r v ic

NOT 4 For7 km/h a da o e"s e d"me n th s e dc p bi tyof h v ehicle (max imum s e du d rfulyla de c n itio s).For

6 km/ha db low,"s e d"me n th o er atin s e dof h v ehicle

ISO 4 0 -1:2 01(E)

Table9—Lo d-c r y ingc pa itie atv rio sspe d —

Ty re withloa ind x(sin le)W12 , spe dsy mbolsFtoM

NOT 1 Th infla tio pr es ur es al b in r ea e forlo da ju tme ts b v e12 %in o s ltatio withth tyr ema nufa ctur er

NOT 2 L a a ju tme ts r ev aldforu eo impr ov eds r fa eo ly

NOT 3 Co s ltr ima dwh elma ufa tur er sforc nfirmatio of h str en thof h r im/whe lforth inte d ds r v ic

NOT 4 For7 km/h a da ov e"s e d"me n th s e dc p bi tyof h v ehicle(max imums e du d rfulyla de c n itio s) For

6 km/ha db low,"s e d"me n th o er atin s e dof h v ehicle

Annex A

(infor ma tiv e)

Guidel ne v alues for metric series, 5°rims

These v alues wi serve as a g idelne for the desig of ty re dimen ion , metric series, mou ted on 5°ta ered

dro -centrerims (code-desig ated) w ith nominal rim diametersupto code16in lu ive For ty r es mou ted on 15°

ta ered dro -centrerims(code-desig ated), se an exB Forty r esmou ted on diferent ypesofrims (mi i

metre-desig ated),otheran exeswi b esta ls ed

TableA.1 —Dime sio alg id l n sfor metric“ 0 ”to “7 ”s rie tyre o 5°tapere rims

Tyred sig dime sion ,mm