BRITISH STANDARD AUTOMOBILE SERIES BS AU 50 4 6 2b 1999 ISO 5751 3 1999 Tyres and wheels — Part 4 Rim profiles and dimensions — Section 6 Motorcycle rims — Subsection 6 2b Specification for metric ser[.]
BRITISH STANDARD AUTOMOBILE SERIES Tyres and wheels — Part 4: Rim profiles and dimensions — Section 6: Motorcycle rims — Subsection 6.2b: Specification for metric series 100, 90, 80, 70, 60, 55 & 50 rims IC S 43 40 ; 83 60 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 50-4-6.2b: 1999 ISO 5751-3: 1999 BS AU 0-4-6.2b:1 999 National foreword This Subsection of this Part of BS AU 50 reproduces verbatim ISO 5751 - 3: 999 and implements it as the UK national standard It supersedes BS AU 50- 4- 2a: 995 which is withdrawn The corresponding tyre details are dealt with in Part (Subsection 2b) of BS AU 50 series Other Parts of the Standard are as follows: — Part : Tyre; — Part 2: Wheels and rim s; — Part 3: Valves Part of BS AU 50 (covering rim profiles and dimensions) was introduced to assist cross- referencing between tyre specifications and the corresponding rim specifications Subsections of Part successively superseded the information contained in BS AU 50- 2- b: 980 which was consequently withdrawn in 995 The UK participation in its preparation was entrusted to Technical Committee AUE/4, Tyres and wheels for motor vehicles, which has the responsibility to: — aid enquirers to understand the text; — present to the responsible international/European committee any enquiries on the interpretation, or proposals for change, and keep the UK interests informed; — monitor related international and European developments and promulgate them in the UK A list of organizations represented on this committee can be obtained on request to its secretary Cross-references The British Standards which implement international or European publications referred to in this document may be found in the BSI Standards Catalogue under the section entitled “International Standards Correspondence Index”, or by using the “Find” facility of the BSI Standards Electronic Catalogue 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, the ISO title page, page ii to iv, pages and 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 This British Standard, having been prepared under the direction of the Engineering Sector Committee, was published under the authority of the Standards Committee and comes into effect on June 999 © BSI 03- 2000 ISBN 80 32440 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 Comments BS AU 0-4-6.2b:1 999 Contents Page National Foreword Foreword Text of ISO 5751 - © BSI 03- 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 front cover iii i ii Reprodu ced by I H S u n d er l i cen se wi th BSI - U n trol l ed Copy blank 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 0-4-6.2b:1 999 Contents Page Foreword iii Scope Normative references Approved rim contours Table — C oefficient for approved rims Tab le — Approved rim contours 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 03 - 000 BS AU 0-4-6.2b:1 999 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 International Standard ISO 5751-3 was prepared by Technical Committee ISO/TC 31, Tyres, rims and valves, Subcommittee SC 10, Cycle, moped, motorcycle tyres and rims This fourth edition cancels and replaces the third edition (ISO 5751-3:1994), of which it constitutes a technical revision ISO 5751 consists of the following parts, under the general title Motorcycle tyres and rims (metric series): — Part 1: Design guides; — Part 2: Tyre dimensions and load-carrying capacities; — Part 3: Range of approved rim contours © BSI 03-2000 Reprodu ced by I H S u n d er l i cen se wi th BSI - U n trol l ed Copy iii iv Reprodu ced by I H S u n d er l i cen se wi th BSI - U n trol l ed Copy blank BS AU -4 -6 b: 999 S cope This part of ISO 5751 specifies the approved rim contours for motorcycle rims on which motorcycle tyres (metric series) are mounted NOTE ISO 4249 deals with the requirements for motorcycle tyres and rims (code- designated series) for rim diameters code ISO 5751 - 2: 994, Motorcycle tyres and rims (metric series) — Part 2: Tyre dimensions and load-carrying capacities ISO 6054- 2: 990, Motorcycle tyres and rims (Code-designated series) — Diameter codes to 12 — Part 2: Rims and above ISO 6054 deals with the requirements for motorcycle tyres and rims (code- designated series) for rim diameters code and below Normative references Approved rim contours 3.1 Table defines the range of permitted rims 3.2 Table lists the rim contour codes approved for The following normative documents contain fitment to motorcycle tyres (metric series) provisions which, through reference in this text, The dimensions of the rim contours, the diameter constitute provisions of this part of ISO 5751 For details and the complete marking of rims with dated references, subsequent amendments to, or nominal rim diameter code and above shall be as revisions of, any of these publications not apply specified in ISO 4249- However, parties to agreements based on this part of ISO 5751 are encouraged to investigate the possibility of applying the most recent editions of the normative documents indicated below For undated references, the latest edition of the normative document referred to applies Members of ISO and IEC maintain registers of currently valid The dimensions of the rim contours, the diameter details and the complete marking of rims with nominal rim diameter code and below shall be as specified in ISO 6054- 3.3 3.4 International Standards The recommended rims correspond to the measuring rim widths specified in ISO 5751 - Motorcycle tyres and rims (code-designated series) — Part 3: Rims ISO 4249- 3: 997, S, Wmax, The design new tyre section width, maximum overall width in service, and the specified in ISO 5751 - will change mm for each code (2, mm) change in rim width from the recommended (measuring) rim width Tab le — C oe fficie nts for app rove d rims C oe fficie nt, S e ries C onstructio n the ore tical, 00 to 80 70 and 60 below 60 Rth minimum, Rx Rmin maximum, Bias 0, 60 0, 50 0, 70 Radial 0, 60 0, 60 0, 70 Bias 0, 70 0, 60 0, 80 Radial 0, 70 0, 70 0, 80 Bias and radial 0, 80 0, 75 0, 85 Rim width = Nominal width (S N) ×R Rmax x Values shall be rounded to the nearest standardized nominal rim width code as specified in ISO 4249- © BSI 03- 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 -4 -6 b: 999 Tab le — Ap proved rim contours Nominal tyre se ction w id th Ap p rove d rims a, b , c Me tric 5 and serie s 30 MT3 75; MT4 00 40 MT4 00; MT4 50 50 MT4 50; MT5 00 60 MT4 50; MT5 00 70 MT5 00; MT5 50 80 MT5 50; MT6 00 90 MT5 50; MT6 00 200 MT6 00; MT6 25; MT6 50 Me tric 60 and serie s 00 (2 50) ; (MT2 50); 75; MT2 75; MT3 00 110 (2 50) ; (MT2 50); (2 75) ; (MT2 75); MT3 00; MT3 50 20 (MT2 75); (MT3 00); MT3 50; MT3 75 30 (MT3 00) ; MT3 50; MT3 75; MT4 00 40 (MT3 50); (MT3 75); MT4 00; MT4 50 50 (MT3 50); (MT3 75); MT4 00; MT4 50 60 (MT3 75); (MT4 00); MT4 50; MT5 00 70 (MT4 00) ; MT4 50; MT5 00; MT5 50 80 (MT4 50); MT5 00; MT5 50 Metric 80 , 90 and 0 serie s 60 (1 20); 40; 50; 60 70 (1 40) ; (1 50); (MT1 50); 60; MT1 60; 85; MT1 85; 80 (1 60) ; 85; 5; MT 85; MT2 90 (1 85) ; 5; 50; (MT1 85); MT2 5; MT2 50 00 (2 5) ; 50; 75; (MT2 5); MT2 50; MT2 75 110 (2 5); 50; 75; (MT2 5) ; MT2 50; MT2 75; MT3 00 20 (2 50); 75; (MT2 50) ; MT2 75; MT3 00 30 d (2 50) ; (2 75); (MT2 50) ; (MT2 75); MT3 00; MT3 50 40 (2 75); (MT2 75) ; (MT3 00); MT3 50; MT3 75 50 (MT3 00); MT3 50; MT3 75; MT4 00 60 (MT3 50); MT3 75; MT4 00; MT4 50 a b Recommended rims are the measuring rims Care should be taken not to fit motorcycle tyres to rims designed for tyres for other types of service (e g passenger car or agricultural tyres) Cylindrical bead seat rims are for tube- type tyres only c d Rims within parentheses are permitted for diagonal ply and bias belted tyres only For tyre size 30/90- 6, a 00D rim (see ISO 6054- 2) is permitted for motorcycles with a maximum speed up to 50 km/h Reprodu ced by I H S u n d er l i cen se wi th BSI - U n trol l ed Copy © BSI 03- 2000 blank 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 0-4-6.2b: 999 BSI — British Standards Institution ISO 75 -3: 999 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