BRITISH STANDARD AUTOMOBILE SERIES BS AU 50 1 1 1c 2001 ISO 4000 1 2001 Passenger car tyres and rims — Part 1 Tyres (metric series) ICS 83 160 10 NO COPYING WITHOUT BS I PERMISSION EXCEPT AS PERMITTED[.]
BRITISH STANDARD AUTOMOBILE SERIES BS AU 50-1 1 c:2001 ISO 4000-1 :2001 Passenger car tyres and rims — Part : Tyres (metric series) I C S 83 NO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAW Reprodu ced by I H S u n d er l i cen se wi th BSI - U n trol l ed Copy BS AU 50-1 1 c:2001 National foreword This B ritis h S tandard rep roduces verb atim IS O 000 - : 00 and implements it as the UK national s tandard It s up ersedes BS AU - b : 96 which is withdrawn The UK p articip ation in its p rep aration was entrus ted to Technical C o mmittee AUE /4 , Tyres and wheels for motor vehicles , which has the resp onsib ility to: — — aid enquirers to unders tand the text; p res ent to the res pons ib le international/E urop ean comm ittee any enquiries on the interp retation, or p rop osals for change, and keep the UK interests informe d; — monitor re lated international and E urop ean develop ments and p rom ulgate them in the UK A list of organiz ations rep resented on this committee can b e ob tained on reques t to its s ecretary C ross-references The Britis h S tandards which implement international p ub lications referred to in this document may b e found in the BS I S tandards C atalogue under the s ection entitled “International S tandards C orres p ondence Index” , or b y using the “Find” facility of the BS I S tandards E lectronic C atalogue A Britis h Standard does not p urport to include all the necess ary p rovisions of a contract Us ers of British S tandards are resp onsib le for their correct ap p lication Compliance with a British Standard does not of itself confer immunity from legal obligations Summary of pages This document comp ris es a front cover, an inside front cover, the IS O title p age, p ages ii to iv, pages to 4, a b lank p age and a b ack cover The BS I cop yright date dis p layed in this document indicates when the document was las t iss ued This Britis h S tandard, having b ee n p rep ared under the direc tion of the E nginee ring S ector P olicy and S trategy C o mmittee, was p ub lis he d under the authority of the Amendments issued since publication S tandards Polic y and S trategy C o mmittee o n January 00 © BS I January 02 ISBN 80 3675 Reprodu ced by I H S u n d er l i cen se wi th BSI - U n trol l ed Copy Amd No D ate C omments I N TE RN ATI ON AL STAN D ARD I SO 4000-1 Seven th ed i ti on 2001 -1 2-1 Passen g er car tyres an d ri m s — Part : Tyres (m etri c seri es) Pneumatiques et jantes pour voitures particulières — Partie 1: Pneumatiques (série millimétrique) Referen ce nu m ber I SO 4000-1 :2001 (E) © OSI 002 Reprodu ced by I H S u n d er l i cen se wi th BSI - U n trol l ed Copy ii Reprodu ced by I H S u n d er l i cen se wi th BSI - U n trol l ed Copy I SO 4000-1 : 2001 (E) Con ten ts Pag e Foreword i v Scope N orm ati ve referen ces Terms an d d efi ni ti on s Desi g n ati on Si ze an d stru cti on Servi ce d escri pti on Oth er servi ce ch aracteri sti cs M arki n g Tyre d i m en si on s 6 Rou n d i ng val u es 6 Cal cu l ati on of d esi g n tyre d i m en si on s 6 Cal cu l ati on of m axi m u m overal l (g rown ) tyre d i m en si on s i n servi ce tyres m ou n ted on th ei r m easu ri n g ri m s Cal cu l ati on of m i n i m u m tyre d i m en si on s for rad i al pl y tyres m ou n ted on th ei r m easu ri n g ri m s Ran g e of approved ri ms Tyre d i m ensi on presen tati on 8 Tyre d i m ensi on m easu rem en t proced u re 9 I n fl ati on pressu res 10 Load capaci ti es 11 Ch oi ce of tyre si zes 12 Cam ber an g l e An n ex A (n orm ati ve) G u i d el i n e val u es for m etri c-seri es tyres 1 An n ex B (n orm ati ve) Load capaci ty i n d i ces for passeng er car tyres 20 An n ex C (n orm ati ve) M i n i m u m i n fl ati on pressu re for i n term ed i ate l oad 28 An n ex D (n orm ati ve) M arki n g of rad i al tyres d esi g n ed for veh i cl es wi th m axi mu m speed s above 240 km /h 32 An n ex E (i n form ati ve) Oth er exi sti n g si ze m arki n g s 33 Bi bl i og raph y 34 iii Reprodu ced by I H S u n d er l i cen se wi th BSI - U n trol l ed Copy I SO 4000-1 : 2001 (E) Foreword ISO (the International Organization for Standardization) is a worldwide federation of national standards bodies (ISO member bodies) The work of preparing International Standards is normally carried out through ISO technical committees Each member body interested in a subject for which a technical committee has been established has the right to be represented on that committee International organizations, governmental and non-governmental, in liaison with ISO, also take part in the work ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization International Standards are drafted in accordance with the rules given in the ISO/IEC Directives, Part Draft International Standards adopted by the technical committees are circulated to the member bodies for voting Publication as an International Standard requires approval by at least 75 % of the member bodies casting a vote Attention is drawn to the possibility that some of the elements of this part of ISO 4000 may be the subject of patent rights ISO shall not be held responsible for identifying any or all such patent rights International Standard ISO 4000-1 was prepared by Technical Committee ISO/TC 31 , Tyres, rims and valves, Subcommittee SC 3, Passenger car tyres and rims This seventh edition cancels and replaces the sixth edition (ISO 4000-1 :1 995), which has been technically revised ISO 4000 consists of the following parts, under the general title Passenger car tyres and rims: ¾ ¾ Part 1: Tyres (metric series) Part 2: Rims Annexes A to D form a normative part of this part of ISO 4000 Annex E is for information only iv Reprodu ced by I H S u n d er l i cen se wi th BSI - U n trol l ed Copy I NTERN ATI ON AL STAN DARD I SO 4000-1 : 2001 (E) Passen g er car tyres an d ri m s — P art : Tyres (m etri c seri es) Scope Th i s part of I S O 40 0 s p eci fi e s th e d e s i g n ati o n , d i m en s i o n s an d l o ad rati n g s of m etri c- s e ri es tyre s pri m ari l y i n te n d e d fo r pas s en g e r cars Norm ati ve referen ces Th e fo l l o wi n g n o rm ati ve d o cu m e n ts co n tai n pro vi s i o n s wh i ch , th ro u g h re fere n ce i n th i s te xt, th i s p art o f I S O 0 n ot appl y po s s i bi l i ty re fe ren ce s , of Fo r d ated H o we ve r, app l yi n g th e l ate s t parti e s th e re fe re n ce s , to m ost e d i ti o n of s u bs e q u en t am e n d m en ts to , ag re em e n ts re ce n t th e bas e d e d i ti o n s n o rm ati ve of on th i s th e d o cu m e n t part of I S O 40 0 n o rm ati ve re fe rre d o r re vi s i o n s o f, to are d o cu m e n ts ap pl i es co n s ti tu te pro vi s i o n s o f an y o f th e s e e n co u rag ed i n d i cated M e m be rs of to b e l o w I SO pu bl i cati o n s i n ve s ti g ate an d th e Fo r u n d ate d I EC m n tai n re g i s te rs o f cu rre n tl y val i d I n t ern ati o n al S t an d ard s I S O 77- , Tyres, valves and tubes — List of equivalent terms I S O 40 0 - , Passenger car tyres and rims — Part : Tyres Part 2: Rims I S O 42 - , Definitions of some terms used in the tyre industry — — Part : Pneumatic tyres Term s an d defi n i ti on s Fo r th e pu rpo s e s o f th i s part of I SO 40 00, th e te rm s an d d efi n i ti o n s g i ve n in I S O 42 - F o r o th e r te rm s u s ed in th i s fi el d , to g e th e r wi th th e i r e q u i val en ts i n o th er l an g u ag e s , s ee I S O 7- Desi g n ati on 4 1 Si ze an d stru cti on Ch aracteri sti cs Th e tyre ch aracte ri s ti cs s h al l b e d es i g n ate d as fo l l o ws : N o m i n al s e cti o n wi d th / N o m i n al as p e ct rati o T yre co n s tru cti o n co d e N o m i n al ri m - d i am ete r co d e Reprodu ced by I H S u n d er l i cen se wi th BSI - U n trol l ed Copy I SO 4000-1 : 2001 (E) N om i n al secti on wi d th Th e n om i n al secti on wi d th of th e tyre sh al l be i n d i cated i n m i l l i m etres, an d th i s part of th e d esi g n ati on sh al l en d i n ei th er th e n u m eral of zero or fi ve, so th at i n an y si n g l e seri es of tyres wi th th e sam e n om i n al aspect rati o, th e val u es sh al l al l en d i n or th e y sh al l al l en d i n For si zes m ou n ted on ° tapered (cod e-d esi g n ated ) ri m s, th e n om i n al secti on wi dth d es i g n ati on sh al l en d i n N om i n al aspect rati o Th e n om i n al aspect rati o ( H/S) sh al l be expressed as a percen tag e an d sh al l be a m u l ti pl e of Tyre stru cti on cod e Th e tyre stru cti on cod e sh al l be as fol l ows: ¾ ¾ ¾ B for bi as-bel ted stru cti on ; D for di ag on al stru cti on ; R for rad i al pl y stru cti on Radi al tyres d esi g n ed for som e exi sti n g veh i cl es wi th a m axim um speed capabi l i ty exceed i n g 240 km /h m ay be desi g n ated an d m arked d i fferen tl y (see an n ex D ) In th e case of tyres desi g n ed for veh i cl es h avi n g a m axi m u m speed capabi l i ty exceed i n g 240 km /h , th e cod e-l etters ZR m ay be i n d i cated wi th th e di m en si on al an d stru cti on al ch aracteri sti cs for radi al pl y tyres i n stead of th e tyre stru cti on cod e R (see 2) For speed s exceed i n g 300 km /h , see an n ex D U se of an y oth er cod e l etter (for exam pl e, i n th e case of a n ew stru cti on type) sh ou l d fi rst be su bm i tted to I SO for acceptan ce N om i n al ri m -d i am eter cod e For tyres m ou n ted on ° tapered (cod e-d esi g n ated ) ri m s, th e cod e sh al l be as g i ven i n Tabl e Tabl e — N om i n al ri m d i am eter cod e N om i n al rim d i am eter cod e N om i n al rim d i am eter, mm Reprodu ced by I H S u n d er l i cen se wi th BSI - U n trol l ed Copy 10 254 12 305 13 330 14 356 15 381 16 406 17 432 18 457 19 483 20 508 D r I SO 4000-1 : 2001 (E) I n th e case of tyres req u i ri n g n ew-con cept ri m s, for safety reason s, especi al l y cern i n g m ou n ti n g , th e cod e n u m ber sh al l be eq u al to th e n om i n al ri m di am eter ( D ) expressed as a wh ol e n u m ber i n m i l l i m etres r Servi ce d escri pti on 2.1 G en eral Th e servi ce d escri pti on sh al l be as fol l ows: Load i n d ex Speed s ym bol I n th e speci al case of tyres d esi g n ed for veh i cl es h avi n g a m axi m u m speed capabi l i ty exceed i n g 300 km /h , th e servi ce d escri pti on n eed n ot be i n d i cated H owever, th e tyre m an u factu rer sh al l be su l ted as to th e m axi m u m speed capabi l i ty an d l oad capaci ty of su ch tyres 2 Th e Load i n d ex m axim u m tyre-l oad-carryi n g capaci ty correspon d i n g to th e s ervi ce d i ti on s speci fi ed by th e tyre m an u factu rer sh al l be i n d i cated by a l oad i n d ex taken from Tabl e 2, per tyre for a si n g l e m ou n ti n g Speed categ ori es A speed categ ory i s assi g n ed to a tyre accord i n g to th e m axi m u m speed for wh i ch i ts u se i s rated Th e speed for each categ ory sh al l be i n d i cated by a l etter-sym bol , accordi n g to th ose g i ven i n Tabl e Oth er servi ce ch aracteri sti cs 4 Th e word “ TU BELESS ” sh al l appear on tyres wi th ou t tu bes Th e words “ R EI N FORC ED ” or “ EXTRA LOAD ” sh al l appear on tyres d esi g n ed for l oad s an d i n fl ati on pressu res h i g h er th an th e stan d ard versi on 3 Th e l etters “ LL ” , cl ose to th e tyre si ze d esi g n ati on , or th e word “ LI G H T LOAD ” sh al l appear on th e si dewal l s of tyres d esi g n ed for l oad s l ower th an th e stan d ard versi on 4 Th e l etter “ T ” , i m m edi atel y preced i n g th e tyre si ze desi g n ati on , sh al l be u sed to ch aracteri ze h i g h -pressu re, speci al , tem porary-u se spare tyres ¾ ¾ ¾ ¾ ¾ ¾ ¾ Speci fi c i n d i cati on s, i f req u i red , m ay be ad d ed to i n d i cate: type of veh i cl e for wh i ch th e tyre i s pri m ari l y d esi g n ed, u si n g th e sym bol “ P ” (see 6) , tem porary u se of certai n spare tyres u si n g i n d i cati on s su ch as “ TEM PORARY U SE ON LY” , bi as-bel ted stru cti on , wi th th e word s “ BI AS-BELTED ” , rad i al pl y stru cti on , wi th th e word “ RADI AL ” , di recti on of m ou n ti n g , di recti on of rotati on , type of tread pattern , an d oth er ch aracteri sti cs Th e opti on al m arki n g “ P ” m ay be u sed wh ere th ere cou l d be am bi g u i ty reg ard i n g th e tyre type I t sh ou l d be posi ti on ed su ch th at fu si on can n ot resu l t from i ts proxi m i ty to an y oth er servi ce di ti on m arki n g Reprodu ced by I H S u n d er l i cen se wi th BSI - U n trol l ed Copy I SO 4000-1 : 2001 (E) Tabl e LI — Correl ati on between l oad i n d ex (LI ) an d tyre-l oad -carryi n g capaci ty (TLCC) TLCC LI TLCC LI TLCC LI TLCC kg kg kg kg 50 90 70 335 90 600 110 060 51 95 71 345 91 61 111 090 52 200 72 355 92 630 112 1 20 53 206 73 365 93 650 113 1 50 54 21 74 375 94 670 114 1 80 55 21 75 387 95 690 115 21 56 224 76 400 96 71 116 250 57 230 77 41 97 730 117 285 58 236 78 425 98 750 118 320 59 243 79 437 99 775 119 360 60 250 80 450 00 800 20 400 61 257 81 462 01 825 — — 62 265 82 475 02 850 — — 63 272 83 487 03 875 — — 64 280 84 500 04 900 — — 65 290 85 51 05 925 — — 66 300 86 530 06 950 — — 67 307 87 545 07 975 — — 68 31 88 560 08 000 — — 69 325 89 580 09 030 — — The maximum tyre load capacity corresponding to the load index shall apply for speeds up to and including 21 km/h For tyres in the speed category V (between 21 km/h and 240 km/h), the maximum load capacity per tyre shall be reduced to 00 % at 21 km/h, 97 % at 220 km/h, 94 % at 230 km/h and 91 % at 240 km/h, and linear interpolation is permitted In the case of speed categories W and Y, the maximum load capacity per tyre corresponding to the load index shall apply for speeds up to and including 240 km/h for W and 270 km/h for Y For tyres in the speed category W (between 240 km/h and 270 km/h), the maximum load capacity per tyre shall be reduced to 00 % at 240 km/h, 95 % at 250 km/h, 90 % at 260 km/h and 85 % at 270 km/h, and linear interpolation is permitted For tyres in the speed category Y (between 270 km/h and 300 km/h), the maximum load capacity per tyre shall be reduced to 00 % at 270 km/h, 95 % at 280 km/h, 90 % at 290 km/h and 85 % at 300 km/h, and linear interpolation is permitted See 4.2.3 and Table list speed categories and their symbols For speeds of over 300 km/h or ZR-marked tyres (see annex D) or both, consult the tyre manufacturer for the maximum tyre load capacity permitted in relation to the maximum speed allowed for the tyre For vehicles with a design maximum speed capability of up to 60 km/h, the maximum load capacity corresponding to the load index may be exceeded, as shown below However, an increase in the reference inflation pressure is necessary and should be determined in consultation with the tyre manufacturer In the absence of such agreement, the following pressure increases are recommended: ¾ for 60 km/h, a % load increase with a kPa inflation pressure increase; ¾ for 50 km/h, a % load increase with a 20 kPa inflation pressure increase; ¾ for 40 km/h, a 25 % load increase with a 30 kPa inflation pressure increase; ¾ for 30 km/h, a 35 % load increase with a 40 kPa inflation pressure increase; ¾ for 25 km/h, a 42 % load increase with a 50 kPa inflation pressure increase Reprodu ced by I H S u n d er l i cen se wi th BSI - 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