BRITISH STANDARD BS AU 50 4 6 3 1991 ISO 6054 2 1990 Tyres and wheels — Part 4 Rim profiles and dimensions — Section 6 Motorcycle rims — Subsection 6 3 Specification for code designated series (diamet[.]
BRITISH STANDARD BS AU 50-4.6.3:1 991 ISO 6054-2: 990 Tyres and wheels — Part 4: Rim profiles and dimensions — Section 6: Motorcycle rims — Subsection 6.3 Specification for code designated series (diameter codes to 2) rims BS AU 0-4.6.3:1 991 Committees responsible for this British Standard The preparation of this British Standard was entrusted by the Automobile Standards Policy 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 Institute of Road Transport Engineers (Incorporated) Motor Cycle Industry’s Association of Great Britain Ltd Motor Industry Research Association National Tyre Distributors’ Association Retread Manufacturers’ Association Road Haulage Association Ltd Royal Automobile Club Society of Motor Manufacturers and Traders Ltd This British Standard, having been prepared under the direction of the Automobile Standards Policy Committee, was published under the authority of the Standards Board and comes into effect on 31 January 992 © BSI 01 - 2000 The following BSI references relate to the work on this standard: Committee reference AUE/4 Draft for comment 89/75746 DC ISBN 80 203 77 Amendments issued since publication Amd No Date Comments BS AU 0-4.6.3:1 991 Contents Page Committees responsible National foreword ii Scope Normative reference Finish Designation Divided rims Drop centre rims Tapered bead seat rims (MT type) Recommended rim widths Rim circumference measurement Annex A (normative) Rim circumference measurement Figure — Divided rim contour Figure — Drop centre rims — Contour dimensions Figure — ° tapered bead seat rim contours (MT type) Figure — Bead seat contours for MT rims without hump Table — Divided rims — Contour dimensions Table — Divided rims — Diameters Table — Drop centre rims — Contour dimensions Table — Drop centre rims — Diameters Table — Dimensions of tapered bead seat rims Table — Bead seat contours for MT rims without hump Table — Recommended rim widths Table A — Mandrel diameters and tape circumferences Publication(s) referred to © BSI 01 - 2000 Inside front cover Inside back cover i BS AU 0-4.6.3:1 991 National foreword This Subsection of this Part of BS AU 50, prepared under the direction of the Automobile Standards Policy Committee, is identical with ISO 6054- 2: 990 “Motorcycle tyres and rims (code-designated series) — Diameter codes to 12 — Part 2: Rims”, published by the International Organization for Standardization (ISO) The corresponding tyre details are dealt with in Part (Subsection 3) Other Parts of the standard are: — Part 1: Tyres; — Part 2: Wheels and rims; — Part 3: Valves Part of BS AU 50 (covering rim profiles and dimensions) has been introduced to assist cross- referencing between tyre specifications and the corresponding rim specifications Subsections of Part will partially supersede the information contained in BS AU 50- b: 980 which has been amended accordingly Cross-references The Technical Committee has reviewed the provisions of ISO 391 , to which reference is made in the text, 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 © BSI 01 - 2000 BS AU 50-4.6.3:1 991 Scope Divided rims This part of ISO 6054 lays down rim dimensions for 5.1 Rim contours an inch- code- designated series of motorcycle tyres for diameter codes to It sets only those rim contour dimensions necessary for the mounting and fitment of the tyre to the rim 1) D imensions and tolerances for divided rims shall b e as given in Table and Figure 5.2 Rim diameters Tyre designations, dimensions and load ratings are The rim diameter code and specified rim diameters given in ISO 6054- shall be as given in Table Normative reference Drop-centre rims The following standard contains provisions which, 6.1 Rim contours through reference in this text, constitute provisions D imensions and tolerances for drop- centre rims of this part of ISO 6054 At the time of publication, shall b e as given in Table and Figure the edition indicated was valid All standards are subj ect to revision, and parties to agreements b ased 6.2 Rim diameters on this part of ISO 6054 are encouraged to The rim diameter code and specified rim diameters investigate the possibility of applying the most shall be as given in Table recent edition of the standard indicated b elow Members of IEC and ISO maintain registers of Tapered bead seat rims (MT type) currently valid International Standards 7.1 Rim contours Wheels /rims — Nomenclature, designation, marking and units of measurement D imensions and tolerances for tapered b ead seat ISO 391 : 977, Finish 3.1 Rim contour rims shall be as given in Tab le and Figure 7.2 Bead seat contours Bead seat contours for MT rims without hump shall be as given in Table and Figure The rim on the side of the tyre shall have a smooth contour free of sharp edges 3.2 Rim valve hole Valve hole edges on the tyre side of rims shall be Recommended rim widths The recommended rim widths are indicated in Table rounded or chamfered O n the hub side, the edges shall be free of burrs, which could damage the valve Designation Rim circumference measurement Information on rim circumference measurement is given in Annex A The rim shall b e designated, in accordance with ISO 391 , by its nominal diameter code and nominal rim width code EXAMPLE × 2.1 1) Further study is to cover harmonization of rim dimensions and tolerances for C , 00 D and 00 E rims, in the future Industrial tyres and rims — Part 1: Pneumatic tyres (metric series) on 5° tapered or flat base rims — Designation, dimensions and marking, ISO 42 51 - 3: 985, Tyres and rims (existing series) for agricultural tractors and machines — Part 3: Rims and this part of ISO 6054 ISO 3739- , © BSI 01 - 000 BS AU 0-4.6.3:1 991 1) See below Table Figure — Divided rim contour Table — Divided rims — C ontour dimensions Dimensions in millimetres Nominal rim width code A B ± 1,5 38 75 44, 2.1 53, 2.1 b 54, 2.5 C 63, 3.00 D 76 3.5 D 89 4.00 E 4.00 D 00 D a b 01 , 27 G +1 –0,5 0, 9, P C ref a 12 R 10 15 16 7, 11,5 2, 14 16 R max R F max 7 12 8, R 10 2, 11,5 12 2, 13 20 8, 3, 14 7, 16 2, 13 8, 2, 5 3, — 11 7, 14 11 4, 6, 6, max 0, 14 2, 16 11 16 For off- centre naves (rims which are split off- centre) where the value is the minimum width for tapered bead seat For nominal rim diameter code only © BSI 01 - 2000 BS AU 0-4.6.3:1 991 Table — Divided rims — Diameters Dimensions in millimetres Nominal rim Specified rim diameter D diameter code 10 100,8 126,2 151,6 177 202,4 227,8 253,2 Figure — Drop-centre rims — Contour dimensions Table — Drop-centre rims — C ontour dimensions Dimensions in millimetres A Nominal rim width B tol code G max tol +1 –0 , 2.1 LF 38 47 55 2.5 C 63,5 ± 1,5 10 13,5 16 +1 –0 , 3.00 D 76 ± 1,5 11 15,5 17,5 3.5 D 89 ± 1,5 11,5 15,5 17,5 85 LF © BSI 01-2000 H L P min 10 11 13 11 13,5 12,5 +1 –0 , 18 +1 –0 , 18 7,5 11,5 10,5 ± 0,5 C R2 R3 R4 R5 max min R1 5,5 6,5 12 11,5 12 17,5 14 12,5 13 4,5 19 15 12,5 13 4,5 3 7,5 max 6,5 6,5 8 BS AU 50-4.6.3:1 991 Table — Drop-centre rims — Diameters Dimensions in millimetres Nominal rim Specified rim diameter D diameter code 10 12 202,4 227,8 253,2 304 Figure — ° tapered bead seat rim contours (MT type) Table — Dimensions of tapered bead seat rims Dimensions in millimetres A Nominal rim width tol code 85 MT 2.1 MT 2.50 MT 2.75 MT 3.00 MT 3.50 MT aE= B 47 55 63,5 70 76 89 C min tol 10,5 +1 –0 , + ,5 –1 G Ea ± H R1 min R2 R3 max 0,5 11,5 R R4 ± 0,5 R6 ± 0,5 R7 ± 0,5 13 10,5 14 15 14 +1 –0 , 12 12,5 2,5 3 2,5 5,5 13 Hump location © BSI 01-2000 BS AU -4 : 991 Tab le — Recommended rim widths Nominal se ction w idth, SN Re co mme nd e d rim widths C od e Figure — Be ad se at contours for MT rims without hump 2.50 2.75 3.00 3.25 3.50 4.00 4.50 6.00 1.50 – 1.75 – 1.85 1.50 – 1.75 – 1.85 – 2.10 – 2.15 1.85 – 2.10 – 2.15 – 2.50 2.10 – 2.15 – 2.50 2.10 – 2.15 – 2.50 2.15 – 2.50 – 3.00 3.00 4.00 Tab le — Be ad se at contours for MT rims without hump Dimensions in millimetres P +2 Nominal rim w idth code 1.85 MT 2.15 MT 2.50 MT 2.75 MT 3.00 MT 3.50 MT © BSI 01-2000 11 13 BS AU 50-4.6.3:1 991 Annex A (normative) Rim circumference measurement The bead seat rim circumference measurements shall be made using a tape gauge the length of which is related to a mandrel diameter which is derived from the specified rim diameter Mandrel diameter and tape circumferences are presented in Table A The tolerance on the mandrel diameter is – 0, 05 mm Table A.1 — Mandrel diameters and tape circumferences Dimensions in millimetres Nominal rim diameter code Tape circumference Mandrel diameter D ; (D – 4) M max ; (D + 4) 99, 97 31 2, 31 5, 25, 37 392, 395, 50, 77 472, 474, 76, 552, 554, 201 , 57 632 634, 226, 97 71 , 71 4, 10 252, 37 791 , 794, 12 303, 951 , 953, a b a Ball tape diameter: mm Ball sizes other than mm may be used if suitable alterations to the mandrel diameter and circumference dimensions are made b ; = 3, 41 59 © BSI 01 - 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