Bsi bs au 050 1 3 1a 1991 (iso 4250 1 1988) scan

B S I BS*AU - *=-e? *SO: PTL :SUBSEC*3.1 A 91 Lb24669 0249041 BRITISH STANDARD AUTOMOBTTIE SERIES O B SAU50: hX t1 : Subsection 3.ia 1991 Is0 4m1 : 1988 Tyres and wheels (Including A mendment 1: 990) (Superseding BS A U 50 part : Subsection TW-2D 14 pages Part Tyres Section Off-the-roadtyres Subsection l a Specification for narrow and wide base tyre designations and dimensions Pneumatiques e t roues Reifen und Räder Partie Pneumatiques Teil S ection Pneumatiques pour engins de génie Abschnitt Geländereifen civil Unterabs chnitt l a Normal- und S ous-section l a Désignations et dimensions B reitfelgenreifen; B ezeichnungen und Mape des pneumatiques base étro ite e t base large - S pécifications Reprodu ced by I H S u n d er l i cen se wi th BSI - U n trol l ed Copy Reifen : : 989) BSI BS AU 50 : B S*AU *50: PTL - Part : : S UBS EC* LA Subsection l a : 91 = Lb24bb9 90 2 W r a - 1991 National foreword This S ubsection of this Part of BS AU 50, prepared under the direction of th e rims - : Automobile S tandards Policy Committee, is identical with IS 4260-1 ‘ Narrow and wide base off-road tyres and dimensions’ as amended by IS 4260-1 : : Part 1 988/Amd : 988 Tyre designation and 990 and published by the International Organization for S tandaidization (ISO) S ubsection of the Part deals with tyre loads and inflation pressures Other Parts of the standard are: Part Wheels and rims; Part Valves, This edition supersedes BS AU 60 : Part which is withdrawn : Section : S ubsection : 989, Cross-references The Technical Committee has reviewed the provisions of IS 4223 -1 and IS 4260-3, to which reference is made in th e text, and has decided that they are acceptable for use in conj unction with this standard : : NCEE The full provisions of IS 4260-3 Part Section 1 980 : 987 will be included in a fu tu re revision of Bs AU 60 : Compliance with a British Standard does not of itself confer immunity from legal obligations Reprodu ced by I H S u n d er l i cen se wi th BSI - U n trol l ed Copy %* - I BS I BS*AU *SO: PTL :SUBSEC*I.LA 91 Lb24bb9 0249043 B S AU 50 : Part : Subsection l a : 991 Contents Page National foreword Ins ide fro n t page Committees res pons ible B ack page S pecification O Intro duc tio n 1 S cope Field of application References Definitions Tyre des ignation Tyredimens i o ns Dual s pacing Recommended Method of meas urement of ty re dimens ions ri m s làb les Type of s ervic e Treaddes i g n Tyre dimens ions for narro w b as e ty re s 3a Tyre dimens ions for narro w bas e ty re s o n SDC rims Tyre dimens ions fo r wide bas e ty re s Dimensions fo r narro w bas e ty re s mo unted o n 15O 5a Tyre dimens ions for 65 s eri es ty res Recommended ri m s rim c o nto urs fo r diagonal and radial narro w bas e ty re s for earth- moving s ervice, mobile c ranes , s hovels , mining cars , loaders an d dozers 6a Recommended Recommended rims for diagonal an d radial w ide bas e ty re s fo r r i m s for diagonal an d radial tyres fo r road graders 8 earth- moving, mining an d logging s ervic e, mobile c ranes , s hovels , mining cars , loaders an d dozers Recommended ri rn s fo r diagonal and radial narro w b as e tyres mo unted o n 15O contours Reprodu ced by I H S u n d er l i cen se wi th BSI - U n trol l ed Copy Recommended ri m s fo r diagonal an d radial 65 s eries ty re s 9 - k x1 BS*AU *SO: PTL :SUBSEC*3.LA 91 W Lb24bb9 0249044 I N TERNATI ON AL STAN DARD b I S 4250-1 988 ( E ) N a rro w an d wi d e base off-ro ad tyres an d ri ms Part : O Tyre designation and dimensions O Introducti on Tyre desi gnati on IS0 4250 provi des techn i cal details o n th e desi gnati on and The desi gnati on of tyres shall i nclu de th e details i n 5.1 and 5.2; dimensions of off-road tyres and rims, as well as l oad rati ngs it may i n clu de those in 5.3 fo r these types of tyres Thi s I n tern ati onal Standard consists of three parts : Part : Tyre designations and dimensions Tyres shall be designated by a two-part size marki ng (nomi nal secti on wi d th - nomi n al ri m diameter code) except as noted i n Part : Loads and i nflati on pressures th e tables Part : Rims Diagonal ply constru cti on shall n o t be specially marked Radial ply constru cti on shall be i denti fi ed by the l etter "R" Tyre si ze a n d co n stru cti o n cod e instead of th e dash, before the ri m diameter i n th e size desi gnati on I n addition, th e word "radial" Scope may also appear on th e tyre Thi s Dart of I S 4250 sets ou t designations and dimensions fo r narrow and wi de base off-road t y i s and recommended ri ms 5.2 i n d e x of t y r e s t r e n g t h The term i s used t o i den ti fy a gi ven tyre wi th i ts maxi mu m Field of appl i cati on recommended l oad wh en used i n a specific type of service Thi s part of I S 4250 applies t o tyres pri mari ly i ntended for offroad machines Other markings may be added, for example as i n 5.3.1 t o 5.3.4 References I S 4223-1 , Definitions try - Part 1: of some terms used in the tyre indus- Pneumatic tyres I S 4250-3, Narrow and wide base off-road tyres and rims Part 3: Rims Defi ni tions For defi n i ti ons of terms relati n g t o tyres, see I S 4223-1 Reprodu ced by I H S u n d er l i cen se wi th BSI - U n trol l ed Copy O th er m arki n g s - 5.3.1 P re fe rre d d i recti o n o f r o t a t i o n The marki ng to i ndi cate the preferred di recti on of rotati on shall be an arrow Tu bel ess t yre s Tyres shall be marked "TUBELESS", i f applicable I S 4250-1 : 988 ( E ) 5.3.3 5.3.4 C o d e s ys t e m fo r t yre u sag e Sem i -d ro p ce n t re ri m s Tyres may be i den ti fi ed by thei r type of servi ce and tread design "TG" as i ndi cated i n tables and respectively centre (SDC) ri ms (see I S 4250-3) Tabl e - shall be used to i d en ti fy tyres mou nted on semi -drop Type of servi ce Servi ce code Type of service C Com pactor E Earth -m ovi n g (du m per an d Tyre di mensi ons Tyre di mensi ons shall be as l i sted : tractor-scraper) G Grader L NOTE - Loader The use o f these i den ti fi cati on codes i s at th e di screti on o f tl i n di vi du al tyre m an u factu rer Tabl e - on SDC ri m s Table : Wide base tyres Table : N arrow base tyres on 5' Table 5a : 65 series tyres ri m tou rs Du al spaci ng wi d th x ,2 G rooved E-I Ri b E-2 Tracti on E-3 Rock E-4 Rock (deep tread) E-7 Fl otati on Recom m en d ed ri ms Recommended ri ms are given as fo l l o ws : G-I Ri b G-2 Tracti on Table : G-3 Rock Table 6a : Di agonal and radi al tyres fo r road graders, L-2 Tracti on Table : Wide base tyres N arrow base tyres L-3 Rock Table : N arro w base tyres on 5' L-4 Rock (deep tread) Table : Di agonal and rad i al 65 series tyres L-5 Rock (extra deep tread) NOTES Th e use o f these i den ti fi cati on codes i s at th e di screti on of th e i n di vi du al tyre m an u factu rer Wh ere sm ooth treads are used i n th e "L" series, den oted b y th e su ffi x "S" base tyres Recommended m i n i m u m dual spacing sh al l be design secti on Sm o o th c- N arrow Tread type c- N arro w base tyres Tread d esi g n Code Table : Table 3a : of tyre di mensi ons Befóre measuring, tyres shall be mou n ted on a measuring ri m, th i s sh ou l d be ( fo r example, L-5S) Code types , and are designated as norm al tread depth Reprodu ced by I H S u n d er l i cen se wi th BSI - U n trol l ed Copy M eth o d of m easu rem en t co n to u r rims i n fl ated t o th e recommended pressure, and all owed t o stand fo r a m i n i m u m of 24 h at n ormal room temperature, after wh i ch th e i n fl ati on pressure shall be readjusted t o the ori gi nal value BS I BS*AU*SO:PTL : SU BSEC*3n LA 1 46 02490 46 T I S 4250-1 Tabl e Tyre size designation 12.00 - 20, 21 12.00 - 24, 25 13.00 - 24, 25 14.00 - 20, 21 14.00 - 24, 25 16.00 - 20, 21 16.00 - 24, 25 18.00 - 24, 25 18.00 - 33 18.00 - 49 21.00 - 24, 25 21.00 - 35 21.00 - 49 24.00 - 25 24.00 - 29 24.00 - 35 24.00 - 43 24.00 - 49 27.00 - 33 27.00 - 49 30.00 - 33 30.00 - 51 33.00 - 51 36.00 - 51 37.00 - 57 40.00 - 57 I I I I Measuring ri m width Code 8.50 8.50 ?O.OO 10.00 11.25 11.25 13.00 13.00 13.00 15.00 15.00 15.00 7.00 7.00 7.00 17.00 17.00 22*oo 9.50 22.00 22.00 24.00 26.00 27.00 29.00 - Design new tyrel l Section Overall wi dth diameter31 315 1 46 315 247 351 I 301 II 375 I I 988 ( E ) Tyre d i m en si o n s fo r n a r r o w base tyres I I : 432 498 498 498 571 57 57 653 653 653 653 653 762 737 823 823 894 988 01 097 I 368 266 391 493 61 81 227 750 2004 360 875 975 127 331 2483 2242 2649 389 2846 997 65 370 526 II Dimensions in millimetres In-service2J I Maximum overall Maximum overall width diameters) 340 340 379 405 405 480 480 553 553 553 634 634 634 725 725 725 725 725 846 818 914 914 992 097 1118 21 I I I ? 342 413114 l1 561 m 693 306 839 093 2449 974 074 226 430 582 2354 761 II I I 315 524 692 1 I I 2) In-service dimensions are the maximum dimensions for grown tyres in-service for use by machine manufacturers in designing for tyre clearances Max overall width = design new tyre section width (S.W.) x (1 tolerance) Tolerances: S.W < 380 mm: % > 380mm: 11 % Max overall diameter = (design new tyre overall diameter - rim diameter) x (1 tolerance) rim diameter Tolerances: S.W < 380 mm: + % > 380mm: + % NOTE - See IS0 4250-3 for rim diameter values 3) Figures are based on tyres with normal tread depth The machine manufacturer should recognize that tyres with deep tread and corresponding increased overall diameter may be used ++ Reprodu ced by I H S u n d er l i cen se wi th BSI - U n trol l ed Copy + + + B S I ~ BS* AU* SO: P TL 91 :SUBSEC*3.LA W b24bb9 90 I I I S 4250-1 : 988 ( E ) - Ta b l e a ) Tyre d i m en si o n s fo r n a r r o w base t yre s o n SDC ri m s Dimensions i n m i l l i m etres Measuring rim Tyre si z e wi d th designation l J r * ) Design n ew tyre3) Section Code I wi d th In-service51 OveraI I Maxi mum overall diameters) wi dth I Maxi mu m overall diameter41 0.00 - 24 TG 8, 00 283 1 51 306 2.00 - 24 TG 00 31 226 337 263 3.00 - 24 TG 00 333 278 360 31 1 84 4.00 - 24 TG 8.00 362 348 39 1 392 6.00 - 24 TG 0.00 427 459 474 527 1) For radi al tyres, replace th e dash í 2) "TG" -1 i n th e size desi g n ati on wi th "R" is a desi g n ati on t o be used t o i den ti fy tyres m ou n ted o n SDC ri m s 3) Design n ew tyre dimensions qu oted i n th e tables are used fo r tyre desi g n purposes on l y 4) Figures are based o n tyres wi th n orm al tread depth Th e m ach i n e m anu factu rer sh ou l d recognize th at tyres wi th deep tread an d correspon d- i n g increased overal l diameter may be used 5) I n -servi ce dimensions are th e m axi m u m di m en si on s fo r g ro wn tyres i n -servi ce fo r use by m ach i n e m an u factu rers i n desi g n i n g fo r tyre clearances Max overal l wi d th = [desi g n new tyre secti on wi d th (S W ) I x Tol eran ces: S W < 380 m m : > 380m m: + + < > 380 m m : 380m m : + + tol eran ce) 11 % % % NOTE - See I S 4250-3 fo r ri m di am eter values Reprodu ced by I H S u n d er l i cen se wi th BSI - U n trol l ed Copy + % Max overall diameter = (desi g n n ew tyre overal l diameter Tol eran ces: S.W (1 - ri m di am eter) x (1 + tol eran ce) + ri m diameter J BS * AU* S O: P T L B S I I P : SU B SE C *~ ~ I A 91 W bb 02490 48 = I S O 4250-1 : 988 ( E) Tabl e - Tyre d i m en si o n s fo r wi d e base tyres Di m en si on s i n m i l l i m e tre s Measuring ri m Tyre size designation 5 - 7.5 20.5 Section Code wi dth 394 - 25 4.00 - 25 00 I I I In-service21 Overall Maximum overall Maximum overall diameters) wid th diameters) 277 437 328 445 348 494 405 520 492 577 I I 561 23.5 - 25 26.5 - 25 22.00 747 839 26.5 - 29 22 00 747 940 29 - 25 25.00 873 29.5 - 29 25.00 975 29.5 - 35 25 00 27 33.25 - 29 33.25 - 35 9.50 27 00 I - 33 28.00 33.5 - 28.00 39 - I 27.00 33.5 35 31 597 61 I 845 845 850 850 O0 663 833 833 833 696 972 074 226 I 98 2242 938 242 944 354 395 944 507 2350 946 2389 o50 2509 37.5 - 33 32.00 952 2389 057 51 37.5 - 32.00 952 541 O57 665 37.5 - 51 2846 057 970 40.51 75 2) 25 wi d th 2.00 37.25 I) Design n ew tyre’ ) 39 - 3941 I 32.00 952 32.00 o29 I 581 I 1 42 708 Desi gn n e w tyre di m en si on s q u o te d i n the tabl es are u sed f o r tyre desi g n pu rposes on l y I n - se rvi ce di m en si on s are th e m axi m u m di m en si on s f o r g ro wn tyre s i n -servi ce f o r use by m ach i n e m an u factu re rs i n d e si g n i n g fo r tyre cl earan ces M ax ove ral l wi d t h To l e ran ce s: M ax = S W ove ral l di am eter To l e ran ce s: S.W d e si g n n e w tyre secti o n wi d t h (S W ) < 380 m m : + % > 3û û m m: + 11 = (d e si g n n e w tyre o ve ral l di am eter < 380 mm: + x (1 + to l e ran ce ) % - ri m d i am e te r) x (1 + to l e ran ce ) + ri m di am eter % > m m : + % N OTE 3) - See IS0 4250-3 f o r ri m di am eter values Fi g u res are based o n tyre s wi t h n o rm al tre ad d e pth Th e m ach i n e manufactu!er sh o u l d recog n i ze th at tyre s wi t h deep tre ad an d co rre spo n d i n g i n creased overal l di am eter m ay b e used I 4) Speci al size d e si g n ati o n Reprodu ced by I H S u n d er l i cen se wi th BSI - U n trol l ed Copy - ! BSI BS*AU*50: PTL - IS0 4260-1 1988 (E) - :SUBSEC*3.LA 9% I 3rb24bb9 02490 I:* r : e Table - Dlmenslons for narrow base tyres mounted on 6O rim contours I Tyre si z e d eal g n ati on width Code M eesu i l n g 66.6 33 69.6 - 59.5 39 69.6 Deslgn 30 - 36 - 11 21 853 diameter3) 2483 808 899 2846 997 166 o ve ral l 998 I mllilmetres I n aervi ca2i width 726 818 097 2649 973 I Maxlmum Overall 737 tebles Dimenslgns i n tyrefl wi d t h new tyre dimensions quoted I n the 080 Menirnurn overall diarnetter3) 2682 761 970 33 31 are ueed for tyre design purposes only, in-service dlmansions are the maximum dimensions for grown tyres in-setvlce for use by machine manufacturersI n deeigning for tyre clearances, Max overall wi dth Tolerances: = design new tyre sectlon wi dth S.W < > Mex overall diameter = Tolerances: 380 mm: 46 380mm: 11 NOTE - See I C K3.W.) + II t tolerance) % (design new tyre overall diameter < 4250-3 for x + SaW 380mm: + 380mm: f % > 31 Design n e w Secti on 23.60 27.00 27.00 - I rim - rim diameter) x (1 f tolerance1 + rim diameter % rlm diameter vsIueB uwd Figures are based on tyrea wi th normal tread depth The machine manufecturershould recognize that tyres wi th deep tread and corresponding Increased overall diameter may be Copyright by the British Standards Institution Fri Feb 11 10:29:30 2000 Reprodu ced by I H S u n d er l i cen se wi th BSI - U n trol l ed Copy , BS I c BS*AU *SO: PTL : S UBS EC* A 91 162 669 0249050 i I S 4250-1 : 988 ( E ) Tabl e a ) - Tyre d i m en s i o n s fo r 65 seri es t yre s Di m en si on s i n m i l l i m etres M e as u ri n g r i m Desi g n n e w tyre * ) I n - s e rvi c e i Ty re s i z e d es i g n ati o n ) wi d th Secti o n O ve ral l M a x i m u m o ve l l M a x i m u m o ve l l Code wi d th d i am e te r3 ) wi d th d i am e te rs ) 25/65 - 25 20.00 635 486 301 65 - 25 24.00 762 656 705 554 29 24.00 762 758 - 33 28.00 889 846 846 029 987 401 65 - 39 32.00 01 352 1 28 461 45 36.00 1 43 675 269 798 501 65 - 51 40.00 270 997 41 33 301 65 35/65 /6 - - Reprodu ced by I H S u n d er l i cen se wi th BSI - U n trol l ed Copy 738 840 24 IS0 4250-1 988 ( E ) T a b l e i n d i c a t e s re c o m m e n d e d r i m s f o r n a r r o w bas e tyre s Ta b l e 6a) - Recom m en d ed t yres Ta b l e - n arro w Recom m en d ed base t yre s cran es, sh ovel s, fo r ri m s f o r mining cars, 8.5, 2.00 - 21 50/1 2.00 - 24 8.5, 8.50V, 2.00 - 25 8, 50/1 3.00 - 24 o.oow 3.00 - 25 0.00/1 - 8.50V, 00/1 4.00 - 24 0.00w - 6.00 - 20 1 25/2.0 'I 25í2 6.00 - 24 1 , 25/2 6.00 - 25 1 25/2 8.00 - 24 3.001 2.5 8.00 - 25 00/2 8.00 - 33 00/2 8.00 - 49 00/2 75 21 00 - 24 5.00/3.0 21 00 - 25 00/3 21 00 - 35 00/3 21 00 - 49 00/3 24.00 - 25 00/3 24.00 - 29 00/3 24.00 - 35 7.00/3.5 24.00 - 43 00/3 24.00 - 49 00/3 27.00 - 33 22 00í4 27.00 - 49 50/4 - 33.00 - 36.00 37.00 24 00/5 - 51 26.00/5.0 - 57 27 00/6 40.00 - 57 29.00/6.0 8.5V5O The tyre and ri rn /wh eel m an u factu rers sh ou l d be su l ted fo r fi rmati on of th e su i tabi l i ty i n ten ded service Reprodu ced by I H S u n d er l i cen se wi th BSI - U n trol l ed Copy of d i ag on al an d I Reco m m en d ed d i a l ri m s4) 0.00 - 24 TG 0 TG SDC 2.00 - 24 TG 0 TG SDC - 0 TG SDC 3.00 8.5V5O 22 00/4 51 d esi g n ati o n ) 83 ) ri m s fo r ro a d g d e rs ' ) ri m s 22 00/4 33 30.00 - 51 Tyre si ze d o zers 00/1 25 6.00 - 21 30.00 d i a l m obi l e 1o.oow 20 4.00 - 21 4.00 - l o a d e rs a n d 2.00 - 20 4.00 an d servi ce, Reco m m en d ed Tyre si ze d e s i g n ati o n NOTE d i ag on al eart h - m o vi n g fo r th e tyre/wh eel assembly fo r th e 1) 24 TG 4.00 - 24 TG 6.00 - 24 TG I O.OOVA SDC 0 TG SDC O.OOVA SDC 00VA SDC Th e tyre an d ri m /wh eel m an u factu rer sh ou l d be su l ted fo r fi rm ati on o f th e su i tabi l i ty of th e tyre/wh eel assembly fo r th e i n tended service or fo r th e use o f al tern ati ve ri m s 2) wi th 3) For radial tyres, "R" "TG" is replace th e dash í See i n th e size desi g n ati on a desi g n ati on t o be used t o i d e n ti fy tyres m ou n ted o n SDC rims 4) - I S0 4250-3 fo r ri m tou rs I S 4250-1 : 988 ( E ) O T a b l e i n d i c a t e s re c o m m e n d e d r i m s f o r w i d e bas e tyre s Tab l e i n d i cate s re co m m e n d e d ri m s f o r n a r r o w base t y re s m o u n t e d o n O c o n t o u rs Tabl e - R e co m m e n d e d ri m s for d i ag on al a n d rad i al w i d e bas e tyres for earth -m ovi n g , Tabl e m i n i n g an d l og g i n g - R e co m m e n d e d ri m s for d i ag on al a n d rad i n a r ro w base tyres m o u n t e d o n O co n to u rs servi ce, m o bi l e cran es, sh ovel s, m i n i n g cars, l oad ers a n d d o zers Tyre si ze d e s i g n ati o n - R eco m m en d ed ri m s 27 - 56.5 20.0 30 - 56.5 22.0 12.0011.3 15.5 - 25 17.5 Tyre si ze d e s i g n ati o n R eco m m en d ed ri m s 12.0011.3 SDC 14 0011.5 25 14 0011.3 SDC 17.0011.711 23.5 - 25 25 22.0013.0 26.5 - 29 22.0013.0 29.5 - 25 25.0013.5 29.5 - 29 25.0013.5 29.5 - 35 25.0013.5 33.25 - 29 27.0013.5 33.25 - 35 27.0013.5 33 28.0014.0 33 - 39 28.0014.0 37.25 - 35 31.0014.0 - 32.0014.5 37 I 33 37 - 39 32.0014.5 37 - 51 32 00/4 40.5175 - 392' I 1) M axi m u m 16 P R or on e star ( * l 2) Special size desi g n ati on NOTE - The tyre and ri m l wh e e l m an u factu rers sh ou l d be su l ted 32 0014.5 Tabl e I NOTE - The tyre an d ri m l wh e e l m an u factu rers sh ou l d be su l ted Publication(s) referred to national foreword Reprodu ced by I H S u n d er l i cen se wi th BSI - U n trol l ed Copy R e co m m e n d e d ri m s fo r d i ag on al a n d rad i 65 Tyre s i z e d e s i g n a t i o n R e co m m e n d e d ri m s ) 2) 19.5012.0 25/65 - 25 I i n ten ded service - seri es tyres fo r fi rmati on of th e su i tabi l i ty of th e tyrel wh eel assembly fo r th e See 27.0 i n ten ded service - - 27.0 59 - fo r fi rmati on o f th e su i tabi l i ty of th e tyrel wh eel assembly fo r th e 19.5012.5 26.5 33 36 - 59.5 17.0012.0 20.5 - 25 I 23.5 39 ~ - 59.5 33 1) 20 0012.0 30165 - 25 24 0013.0 30165 - 29 24 0013.0 35/65 - 33 28 00i3 40165 - 39 32.0014.0 45/65 - 45 36.0014.5 50165 - 51 40.0014.5 The tyre an d ri m l wh e e l m an u factu rer sh ou l d be su l ted fo r fi rm ati on o f th e su i tabi l i ty of th e tyre l wh e e l assembly fo r th e i n tended service or fo r th e use of al tern ati ve rims 2) For radi al tyres, replace th e dash í - wi th "R" i n th e size desi g n ati on BSAU50: RW t1 : Subsection h : 1991 Tso am : 1988 Committees responsible for this British Standard The preparation of this B ritish S tandard was entius ted by t h e Automobile S tandards Policy Committee (AUE/-) to lkchnical Committee AUE/4, upon which th e following bodies were represented: Agricultural Engineers’ Association Automobile Association B ritish Industrial Truck Association B ritish Pressure Gauge Manufacturers’ Association B ritish Rubber Manufacturers’ Association Bus and Coach Council Department of Transport Freight Transport Association Ins titute of Road Transport Engineers (Inc) Motor Cycle Industry’ s Association of Great B ritain Ltd Motor Industry Research Association National Tyre Distributors’ Association Retread Manufacturers’ Association Road Haulage Association Ltd Royal Automobile Club S ociety of Motor Manufacturers and Traders Ltd This B ritish S tandard, having been prepared under t h e direction of th e Automobile Amendments issued since publication S tandards Poiicy Committee, was published under t h e authority of t h e S tandards B oard AmdeNo * I Date I ll?xt affected and comes into effect o n 30 August 991 O BSI 991 I The foliowing BSI references l relate t o the work on this standard: Committee reference AUE14 Drafts for comment 861 771 83 DC and 891 78926 DC ISBN 91 08- O 680 19920 5- 0.86k- B Reprodu ced by I H S u n d er l i cen se wi th BSI - U n trol l ed Copy B SI , Park Street, London W1A PW-2D-14 2BS BSI, Linford Wood, Milton Keynes MK14 6LE AUE14