BRITISH STANDARD AUTOMOBILE SERIES BS AU 50 1 7 1 1989 ISO 5995 1 1982 Tyres and wheels — Part 1 Tyres — Section 7 Moped tyres — Subsection 7 1 Specification for tyre designations, dimensions and load[.]
BRITIS H S TAND ARD AUTO MO BILE S E RIE S BS AU -1 : 989 IS O 995 -1 : 982 Tyres and wheels — Part : Tyres — Section 7: Moped tyres — Sub section Specification for tyre designations, dimensions and load ratings [IS O title : Mop ed tyre s and rims — Part : Tyres] UDC 629 1 01 5: (083 3): 629 1 35: 006 3/ 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 0-1 7.1 :1 989 Committees responsible for this British Standard The preparation of this British Standard was entrusted by the Automobile Standards Committee (AUE/- ) to Technical Committee AUE/4, upon which the following bodies were represented: Agricultural Engineers’ Association Automobile Association British Industrial Truck Association British Pressure Gauge Manufacturers’ Association British Rubber Manufacturers’ Association Bus and Coach Council Department of Transport Freight Transport Association Ministry of Defence Motor Cycle Association of Great Britain Motor Industry Research Association Retread Manufacturers’ Association Road Haulage Association Ltd Society of Motor Manufacturers and Traders Ltd This British Standard, having been prepared under the direction of the Automobile Standards Committee, was published under the authority of the Board of BSI and comes into effect on 28 February 989 © BSI 02- 2000 The following BSI references relate to the work on this standard: Committee reference AUE/4 Draft for comment 78/71 455 DC ISBN 80 71 33 Reprodu ced by I H S u n d er l i cen se wi th BSI - U n trol l ed Copy Amendments issued since publication Amd No Date of issue Comments BS AU 0-1 7.1 :1 989 Contents Page Committees responsib le Inside front cover National foreword ii Scope Field of application References D efinitions Section Tyre designation and dimensions Tyre designation Tyre dimensions Method of measurement of tyre dimensions Section Load ratings Load capacities and inflation pressures Annex Tyres for small cub ic capacity motorcycles and mopeds Tab le — Nominal rim diameter code Tab le — Section height Tab le — Moped tyres in highway service — D esignation and dimensions — Rim diameter code: to 2 Tab le — Moped tyres in highway service — D esignation and dimensions — Rim diameter code: to Tab le — Maximum load capacity for corresponding inflation pressure — Rim diameter code: to 2 Tab le — Maximum load capacity for corresponding inflation pressure — Rim diameter code: to Tab le — Load capacities and relevant inflation pressures Pub lications referred to © BSI 02 - 000 Reprodu ced by I H S u n d er l i cen se wi th BSI - U n trol l ed Copy Inside back cover i BS AU 0-1 7.1 :1 989 National foreword This Subsection of this Part of BS AU 50, prepared under the direction of the Automobile Standards Committee, is identical with ISO 5995- : 982 (confirmed 987) “Mop ed tyres and rim s — Part : Tyres ” published by the International Organization for Standardization (ISO) Other Parts of the standard are: — Part 2: Wheels and rim s; — Part 3: Valv es Terminology and conventions The text of the International Standard has been approved as suitable for publication as a British Standard without deviation Some terminology and certain conventions are not identical with those used in British Standards; attention is drawn especially to the following Wherever the words “International Standard” appear, referring to this standard, they should be read as “Subsection of BS AU 50” The comma has been used as a decimal marker In British Standards it is current practice to use a full point on the baseline as the decimal marker Cross-references There are no corresponding British Standards for ISO 3833: 977 or ISO 4223- : 978 The Technical Committee has reviewed the provisions of ISO 3833 and ISO 4223- and has decided that they are acceptable for use in conj unction with this standard A British Standard does not purport to include all the necessary provisions of a contract Users of British Standards are responsible for their correct application Compliance with a British Standard does not of itself confer immunity from legal obligations Summary of pages This document comprises a front cover, an inside front cover, pages i and ii, pages to 6, an inside back cover and a back cover This standard has been updated (see copyright date) and may have had amendments incorporated This will be indicated in the amendment table on the inside front cover ii Reprodu ced by I H S u n d er l i cen se wi th BSI - U n trol l ed Copy © BSI 02- 2000 BS AU 0-1 7.1 :1 989 5.2 Service characteristics shall include the word Scope “MOPED” or “CYCLOMOTEUR” or This International Standard establishes the designation, dimensions, and load ratings for moped tyres 1) ISO 5995- will deal with requirements for rims 2) Field of application This International Standard applies to moped tyres, having a maximum speed of 50 km/h, fitted on rims “CICLOMOTORE” Tyre dimensions 6.1 Calculation of “design new tyre” dimensions 6.1 Design new tyre overall diameter ( o) D The design new tyre overall diameter is the sum of with a nominal diameter corresponding to the the nominal rim diameter (Dr) plus twice the design codes – – – – – – – – – new tyre section height (H): – 22 D o References ISO 3833, = D r + H For those tyres using a nominal rim diameter code, see, in Table , the value of Ro ad vehicles — Typ es — Term s and D r to be used Table — Nominal rim diameter code definitions ISO 4223- , Nominal rim diameter Definition of som e term s used in the tyre C ode D Definitions 203 229 For the purposes of this International Standard, the 10 254 definitions given in ISO 4223- as well as the 12 305 following definition apply 14 356 4.1 15 381 moped 16 406 a two- wheeled or three- wheeled motor- driven 17 432 vehicle, with a maximum design speed not 18 457 exceeding 50 km/h If the driving motor is a thermic 19 483 engine, its displacement or equivalent capacity 22 559 must not exceed 50 cm [Definition given in ISO 3833] r mm indus try — Part : Pneum atic tyres 6.1 Design new tyre section height ( ) H For the design new tyre section height (H) Section Tyre designation and corresponding to nominal section width (SN), dimensions see Table Table — Section height Tyre designation Nominal section width The designation shall be shown on the sidewall of Section height S H N mm C ode the tyre and shall include dimensional and service characteristics marking, and such markings shall 3/4 53 be close to each other 56 Dimensional characteristics shall include: /4 63 /2 71 3/4 76 82 /4 90 1 Nominal section width The nominal section width shall be expressed by a code (see Table for code correlations) Nominal rim diameter The nominal rim diameter shall be expressed by a code (see Table for code correlations) 1) 2) An International Standard is in preparation relating to a special series of moped tyres having a maximum speed of 00 km/h In preparation © BSI 02- 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 AU 50-1 7.1 :1 989 6.2 Calculation of “maximum overall (grown) 6.3 Design new tyre dimensions and overall tyre dimensions in service” tyre dimensions in service These dimensions include protective ribs, lettering, Table give design new tyre dimensions in service embellishment, manufacturing tolerances, special for tyres designated rim diameter tread configurations and growth due to service codes to 22 Table is for rim diameter codes 6.2.1 Maximum overall (grown) width in service (Wmax) to The maximum overall width in service is equal to the product of the design new tyre section width ( by the coefficient , 08: W max = , 08 S) S Method of measurement of tyre dimensions Before measuring, tyres shall be mounted on the measuring rim, inflated to the recommended pressure, and allowed to stand for a minimum Maximum overall (grown) diameter in service (Do max) inflation pressure shall be readj usted to the original The maximum overall diameter in service is equal to value 6.2.2 the nominal rim diameter ( D ) plus twice the r product of the design new tyre section height ( the coefficient , 08: D =D o r + 2, of 24 h at normal room temperature, after which the H) by H Table — Moped tyres in highway service — Designation and dimensions — Rim diameter code: to 22 Dimensions in millimetres Measuring Tyre designation Design new tyre dimensions rim width R 3/4–1 Section Outer Maximum overall Maximum overall width diameter section width diameter S M Grown tyre dimensions in service D D W max o o max MOPED or CYCLOMOTEUR 30, 50 589 54 597 or CICLOMOTORE 2–1 ” 468 2–1 ” 51 2–1 ” 2–1 ” 569 578 2–1 ” 595 604 2–22 ” 670 680 /4–1 ” 482 492 /4–1 ” 507 51 /4–1 ” 532 /4–1 ” /4–1 ” 583 593 /4–1 ” 609 61 /4–22 ” 685 695 /2–1 ” 523 534 /2–1 ” 548 559 /2–1 ” /2–1 ” 599 61 /2–1 ” 625 636 3/4–1 ” 533 3/4–1 ” 3/4–1 ” 584 3/4–1 ” 609 3–1 ” 47, 81 596 87 609 /4–1 ” 55 89 637 96 651 Reprodu ced by I H S u n d er l i cen se wi th BSI - U n trol l ed Copy 34, 38 40, 47, 55 62 68 75 544 558 574 558 477 527 59 553 542 67 73 568 585 545 81 570 596 621 © BSI 02- 2000 BS AU 0-1 7.1 :1 989 Table — Moped tyres in highway service — Designation and dimensions — Rim diameter code: to D imens ions in millimetres Design new tyre dimensions Grown tyre dimensions in service Measuring Tyre designation –1 MO PE D or rim width R Section Outer Maximum overall Maximum overall width diameter section width diameter S M D W o D max 4, 55 41 59 42 38 62 43 67 441 44, 70 o max C YC LO MO TE UR or C IC LO MO TO RE /4–1 ” /2 –8 ” /2 –9 ” /4–9 ” –1 ” –1 ” 356 45 76 82 71 44, 73 53, 84 81 79 41 393 43 91 469 482 Section Load ratings Load capacities and inflation pressures 8.1 The load cap acities and the relevant inflation p res sures s hown in the tab les refer to the maximum sp eed of km/h in the cas e of tyres marked in accordance with © BS I - 00 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 -1 : 989 Tab le — Maximum load cap acity for corresponding inflation pre ssure — Rim diame ter code : to 2 Maximum lo ad cap acity, kg Tyre de signatio n a Inflation pressure b Inflation pressure kPa 3/4–1 b 75 kPa MO PE D or C YCLO MO TEUR or 80 — C IC LO MO TO RE –1 ” 75 — –1 ” 80 — –1 ” 85 — — 110 –1 RE INFO RCE D –1 ” 85 — –1 ” 90 — –2 ” 95 — /4–1 ” 90 — /4–1 ” 90 — /4–1 ” 95 — — 30 00 — — 35 /4–1 RE INFO RC ED ” /4–1 /4–1 RE INFO RC ED /4–1 ” 05 — /4–1 ” 05 — — 45 115 — — 55 /4–1 RE INFO RC ED ” /4–2 2 /4–2 RE INFO RC ED /2 –1 ” 05 — /2 –1 ” 110 — — 50 /2 –1 RE INFO RC ED /2 –1 ” 115 55 /2 –1 ” 20 — /2 –1 ” 20 — — 65 /2 –1 RE INFO RC ED 3/4–1 ” 20 — 3/4–1 ” 25 — — 70 30 — — 75 3/4–1 RE INFO RC ED 3/4–1 ” 3/4–1 RE INFO RC ED 3/4–1 ” 35 — 3–1 ” 45 — — 95 75 — 3–1 RE INFO RCE D /4–1 a b ” Reinforced may be replaced b y the ab breviation “RE INF” kPa = –2 b ar Reprodu ced by I H S u n d er l i cen se wi th BSI - U n trol l ed Copy © BSI 02 - 000 BS AU -1 : 989 Tab le — Maximum load cap acity for corre sp onding inflation pre ssure — Rim diame te r code: to Maximum load cap acity, kg Tyre de signation a Inflation pressure b Inflation pressure 50 kPa –1 b 75 kPa MO PE D or C YCLO MO TEUR or 70 — C IC LO MO TO RE /4–1 ” 80 — /2 –8 ” 75 — — 05 /2 –8 RE INFO RCED /2 –9 ” 80 — 3/4–9 ” 90 — 3–1 ” 110 — 3–1 ” 20 — a b Reinforced may b e replaced b y the ab breviation “RE INF” kPa = –2 bar © BSI 02 - 000 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 -1 : 989 Annex Tyres for small cub ic capacity motorcycles and mopeds (not part of the Standard.) Some tyres of similar size designation and dimensions to those shown in Table but with different performance capabilities are manufactured These tyres designed for a maximum speed of 100 km/h have the following differences: a) the word “MOPED” or “CYCLOMOTEUR” or “CICLOMOTORE” is not marked on the tyre sidewall; b) the service characteristics indicating the “LOAD INDEX” and the “SPEED SYMBOL” may be marked on the tyre side wall NOTE Speed symbol “J” (100 km/h) would apply; c) the load capacities and relevant inflation pressures appropriate to a maximum speed of 100 km/h, are shown in ; d) the load capacities of Table can be increased by up to 30 % when the above tyres are fitted on mopeds (max speed 50 km/h) designed for carrying an additional passenger The relevant inflation pressure must be fixed by agreement with the relevant tyre manufacturer Tab le — Load cap acities and re le vant inflation pre ssures Tyre de signation 2–16 2–17 REINF 2–18 2–19 1/4–15 1/4–16 1/4–16 REINF 1/4–17 1/4–17 REINF 1/4–18 1/4–19 1/2–16 1/2–16 REINF 1/2–17 1/2–17 REINF 1/2–18 1/2–19 1/2–19 REINF 3/4–16 3/4–17 3/4–17 REINF 3–17 3–17 REINF 3–18 1/4–18 20 J 31 J 22 J 24 J 24 J 26 J 38 J 28 J 39 J 30 J 30 J 31 J 42 J 33 J 43 J 35 J 35 J 45 J 36 J 38 J 47 J 41 J 51 J 42 J 47 J a Load cap acity, 80 109 85 90 90 95 132 100 136 106 106 109 150 115 155 121 121 165 125 132 175 145 195 150 175 kg a “REINF” may be replaced by “REINFORCED” in the tyre size designation b kPa = 10–2 bar Reprodu ced by I H S u n d er l i cen se wi th BSI - U n trol l ed Copy kPab Inflatio n p re ssure , 250 275 250 250 250 250 275 250 275 250 250 250 275 250 275 250 250 275 250 250 275 250 275 250 250 © BSI 02-2000 BS AU 0-1 7.1 :1 989 Publications referred to See national foreword © BSI 02 - 000 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 0-1 7.1 :1 989 ISO 995 -1 : BSI — British Standards Institution 982 BS I is the indep endent national b ody res p ons ib le for p rep aring Britis h S tandards It p res ents the UK view on s tandards in E urop e and at the international level It is incorp orated b y Royal C harter Revisions Britis h S tandards are up dated b y amendment or revis ion Us ers of Britis h S tandards should make s ure that they p oss es s the latest amendments or editions It is the constant aim of BS I to imp rove the quality of our p roducts and services We would b e grateful if anyone finding an inaccuracy or amb iguity while us ing this Britis h S tandard would inform the S ecretary of the technical committee res p ons ib le, the identity of which can b e found on the inside front cover Tel: 02 89 96 90 00 Fax: 02 89 96 40 BS I offers memb ers an individual up dating s ervice called PLUS which ens ures that s ub s crib ers automatically receive the lates t editions of s tandards Buying standards O rders for all BS I, international and foreign s tandards p ub lications s hould b e addres s ed to C us tomer S ervices Tel: 899 00 Fax: 899 7001 In res p ons e to orders for international standards , it is BS I p olicy to sup p ly the BS I imp lementation of thos e that have b een p ub lis hed as Britis h S tandards, unless otherwis e requested Information on standards BS I p rovides a wide range of information on national, E urop ean and international standards through its Lib rary and its Technical H elp to E xp orters S ervice Various BS I electronic information s ervices are also availab le which give details on all its p roducts and s ervices C ontact the Information C entre Tel: 02 89 96 71 1 Fax: 02 89 96 048 S ub s crib ing memb ers of BS I are kep t up to date with s tandards develop ments and receive sub s tantial discounts on the p urchase p rice of s tandards For details of thes e and other b enefits contact Memb ership Adminis tration Tel: 02 89 96 70 02 Fax: 02 89 96 00 Copyright C op yright s ub s is ts in all BS I p ub lications BS I als o holds the cop yright, in the UK, of the p ub lications of the international s tandardization b odies E xcep t as p ermitted under the C op yright, D es igns and Patents Act 988 no extract may b e rep roduced, s tored in a retrieval s ystem or transmitted in any form or b y any means – electronic, p hotocop ying, recording or otherwis e – without p rior written p ermis s ion from BS I This does not p reclude the free us e, in the cours e of imp lementing the standard, of necess ary details such as s ymb ols, and size, typ e or grade designations If thes e details are to b e used for any other p urp os e than imp lementation then the p rior written p ermiss ion of BS I must b e ob tained If p ermis sion is granted, the terms may include royalty p ayments or a licensing agreement D etails and advice can b e ob tained from the C op yright Manager BS I 89 C his wick H igh Road London W4 4AL Reprodu ced by I H S u n d er l i cen se wi th BSI - U n trol l ed Copy Tel: 02 89 96 70