BS-AU-50-1.6.2B-1995 ISO-5751-2-1994.pdf

BRITISH STANDARD AUTOMOBILE SERIES BS AU 50-1.6.2b:1995 ISO 5751-2: 1994 Incorporating Amendment No. 1 to BS AU 50-6.2a:1995 (Renumbers the BS as BS AU 50-6.2b:1995)Tyres and wheels Part 1: Tyres Section 6: Motorcycle tyres Subsection 6.2b Specification for designations, dimensions and load ratings for metric series 100, 90, 80, 70, 60, 55 and 50 tyres ICS 43.140; 83.160.10 Licensed Copy: London South Bank University, London South Bank University, Sat Dec 09 02:11:20 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS AU 50-1.6.2b:1995 This British Standard, having been prepared under the direction of the Engineering Sector Board, was published under the authority of the Standards Board and comes into effect on 15 December 1995 © BSI 06-1999 The following BSI references relate to the work on this standard: Committee reference AUE/4 Draft for comment 92/84229 DC ISBN 0 580 24919 0 Committees responsible for this British Standard The preparation of this British Standard was entrusted to Technical Committee AUE/4, Tyres and wheels for motor vehicles, 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 Confederation of Passenger Transport UK Department of Transport Freight Transport Association Institute of Road Transport Engineers (Inc) Motor Cycle Industrys Association of Great Britain Ltd. Motor Industry Research Association National Tyre Distributors Association Retread Manufacturers Association Road Haulage Association Ltd. Society of Motor Manufacturers and Traders Ltd. Amendments issued since publication Amd. No.DateComments 9987May 1998Indicated by a sideline in the margin Licensed Copy: London South Bank University, London South Bank University, Sat Dec 09 02:11:20 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS AU 50-1.6.2b:1995 © BSI 06-1999i Contents Page Committees responsibleInside front cover National forewordii 1Scope1 2Normative references1 3Definitions1 4Tyre designation1 5Tyre dimensions1 6Method of measurement of tyre dimensions1 7Tread configurations1 8Maximum load ratings2 9Inflation pressures2 10Load capacity at reduced speeds2 Annex A (informative) Bibliography22 Table 1 100 series tyre dimensions Design and in-service National rim diameter codes 14, 15, 16, 17, 18 and 193 Table 2 100 series tyre dimensions Design and in-service Nominal rim diameter codes 8, 10 and 124 Table 3 90 series tyre dimensions Design and in-service Nominal rim diameter codes 14, 15, 16, 17, 18, 19 and 215 Table 4 90 series tyre dimensions Design and in-service Nominal rim diameter codes 8, 10 and 126 Table 5 80 series tyre dimensions Design and in-service Nominal rim diameter codes 14, 15 16, 17, 18, 19 and 217 Table 6 80 series tyre dimensions Design and in-service Nominal rim diameter codes 8, 10 and 128 Table 7 70 series tyre dimensions Design and in-service Nominal rim diameter codes 16, 17, 18 and 199 Table 8 60 series tyre dimensions Design and in-service Nominal rim diameter codes 16, 17, 18 and 1910 Table 9 55 series tyre dimensions Design and in-service11 Table 10 50 series tyre dimensions Design and in-service12 Table 11 Maximum tyre load ratings for 100 series tyres Nominal rim diameter codes 14, 15, 16, 17, 18 and 1913 Table 12 Maximum tyre load ratings for 100 series tyres Nominal rim diameter codes 8, 10 and 1214 Table 13 Maximum tyre load ratings for 90 series tyres Nominal rim diameter codes 14, 15, 16, 17, 18, 19 and 2115 Table 14 Maximum tyre load ratings for 90 series tyres Nominal rim diameter codes 8, 10 and 1216 Table 15 Maximum tyre load ratings for 80 series tyres Nominal rim diameter codes 14, 15, 16, 17, 18, 19 and 2117 Table 16 Maximum tyre load ratings for 80 series tyres Nominal rim diameter codes 8, 10 and 1218 Table 17 Maximum tyre load ratings for 70 series tyres19 Table 18 Maximum tyre load ratings for 60 series tyres19 Table 19 Maximum tyre load ratings for 55 series tyres20 Table 20 Maximum tyre load ratings for 50 series tyres20 Table 21 Variation of maximum load capacities of tyres according to maximum speed of motorcycle21 List of referencesInside back cover Licensed Copy: London South Bank University, London South Bank University, Sat Dec 09 02:11:20 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS AU 50-1.6.2b:1995 ii © BSI 06-1999 National foreword This Subsection of this Part of BS AU 50 has been prepared by Technical Committee AUE/4 and is identical to ISO 5751-2:1994 Motorcycle tyres and rims (metric series) Part 2: Tyre dimensions and load-carrying capacities, including Amendment 1 published by the International Organization for Standardization (ISO). Other Parts of the Standard are: Part 2: Wheels and rims; Part 3: Valves; Part 4: Rim profiles and dimensions. This Subsection supersedes BS AU 50-1.6.2:1989 which is withdrawn. The Technical Committee has reviewed the provisions of ISO 4223-1:1989, to which normative reference is made in the text, and has decided that they are acceptable for use in conjunction 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. Cross-references International standardCorresponding British Standard BS AU 50 Tyres and wheels Part 1: Tyres Section 6: Motorcycle tyres ISO 5751-1:1994Subsection 6.1a Specification for general requirements and design guide for designations, dimensions and load ratings for metric series tyres (Identical) Summary of pages This document comprises a front cover, an inside front cover, pages i and ii, pages 1 to 22, 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. Licensed Copy: London South Bank University, London South Bank University, Sat Dec 09 02:11:20 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS AU 50-1.6.2b:1995 © BSI 06-19991 1 Scope This part of ISO 5751 specifies the designation, dimensions and load-carrying capacities of metric series 100, 90, 80, 70, 60, 55 and 50 motorcycle tyres to be mounted on the metric series of rims. It applies to motorcycle tyres with reduced height/width ratio (low profile 100, 90, 80, 70, 60, 55 and 50). NOTE 1ISO 4249 deals with the requirements for motorcycle tyres and rims (code-designated series) for rim diameters code 13 and above. ISO 6054 deals with the requirements for motorcycle tyres and rims (code-designated series) for rim diameters code 12 and below. 2 Normative references The following standards contain provisions which, through reference in this text, constitute provisions of this part of ISO 5751. At the time of publication, the editions indicated were valid. All standards are subject to revision, and parties to agreements based on this part of ISO 5751 are encouraged to investigate the possibility of applying the most recent editions of the standards indicated below. Members of IEC and ISO maintain registers of currently valid International Standards. ISO 4223-1:1989, Definitions of some terms used in the tyre industry Part 1: Pneumatic tyres. ISO 5751-1:1994, Motorcycle tyres and rims (metric series) Part 1: Design guides. 3 Definitions For the purposes of this part of ISO 5751, the definitions given in ISO 4223-1 apply. 4 Tyre designation In the tyre designation, the tyre size designation shall be as shown in Table 1. The designation shall be completed by the addition of the “service description”, i.e. load index and speed symbol see 4.2 b). 4.1 Tyre construction code The tyre construction code shall be as follows: “” for diagonal ply tyres; “B” for bias-belted; “R” for radial ply tyres. 4.2 Example A motorcycle tyre having a) a size and construction of: nominal section width 100 mm, nominal aspect ratio 90, diagonal construction, nominal rim diameter code 18; b) service description of: load-carrying capacity 224 kg, reference speed 150 km/h; shall be marked The load-carrying capacity and maximum speed codes are given in ISO 5751-1:1994, Table 3 and Table 4 respectively. 4.3 Motorcycle tyre indication For nominal rim diameter codes 13 up to 19 inclusive, it is recommended to add the suffix “M/C” to the size and construction marking. 5 Tyre dimensions Table 1 to Table 10 show: a) the tyre designation as indicated in clause 4; b) the measuring rim width code; c) the design tyre dimensions, i.e. section width and overall diameter; d) the maximum tyre dimensions in service, i.e. overal width and overall diameter, for the various types of “tread configurations” to be considered by vehicle manufacturers in designing for tyre clearances. 6 Method of measurement of tyre dimensions Before measuring, the tyre shall be mounted on the measuring rim ready for tyre fitment and inflated: a) for standard load tyres: 225 kPa for speed symbols P and lower, 250 kPa for speed symbol S, 280 kPa for speed symbols higher than S; b) for extra load tyres: 280 kPa for speed symbols M and P; and allowed to stand for 24 h at normal room temperature, after which the inflation pressure shall be readjusted to the values shown above. 7 Tread configurations Figure 1 in ISO 5751-1:1994 shows various tread configurations. NOTE 2These attributions of tread type configurations to the service are to be considered as examples only. The choice of a given tread type configuration for a given tyre depends on the tyre manufacturer alone. Tread type A corresponds to highway service tyres manufactured in speed symbols P, S and higher. Tread type B corresponds to highway service tyres (for high performance vehicles) manufactured in speed symbols S and higher. 100/90 18 56 P Licensed Copy: London South Bank University, London South Bank University, Sat Dec 09 02:11:20 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS AU 50-1.6.2b:1995 2 © BSI 06-1999 Tread type C corresponds to tyres for on-and-off-road service manufactured in speed symbols up to H inclusive. Tread type D corresponds to tyres for exclusive off-road service manufactured in speed symbol M. 8 Maximum load ratings Table 11 and Table 12 show the maximum tyre load ratings for 100 series tyres. Table 13 and Table 14 show the maximum tyre load ratings for 90 series tyres. Table 15 and Table 16 show the maximum tyre load ratings for 80 series tyres. Table 17 shows the maximum tyre load ratings for 70 series tyres. Table 18 shows the maximum tyre load ratings for 60 series tyres. Table 19 shows the maximum tyre load ratings for 55 series tyres. Table 20 shows the maximum tyre load ratings for 50 series tyres. 9 Inflation pressures The inflation pressures are given as a guide only. The inflation pressures used in practice are subject to agreement between the tyre and vehicle manufacturers and should take into account not only the load, but also the tyre construction, road-holding, maximum speed, the location of the tyre, the operating conditions and the mechanical characteristics of the vehicle. The maximum load-carrying capacity is referred to the following inflation pressures: a) rim diameter codes up to 12 inclusive: normal load version: 250 kPa, light load version: 175 kPa extra load version: 300 kPa; b) rim diameter codes 13 and above (applies also to rim diameter codes 12 and below in series 70 and below): 1) normal load version: tyres marked with speed symbols up to and including P: 225 kPa, tyres marked with speed symbols Q, R, S: 250 kPa, tyres marked with speed symbols T, U, H: 280 kPa, tyres marked with speed symbol V: 290 kPa, 2) extra load version tyres with speed symbols up to and including P: 280 kPa. 10 Load capacity at reduced speeds Subject to acceptance by the tyre manufacturer and taking into account the conditions of use of the motorcycle, the load capacities corresponding to the load indices indicated in Table 11 to Table 20 may be modified according to the percentage shown in Table 21. This modification is possible when the motorcycle maximum speed is different from the one which is associated with the speed symbol. Licensed Copy: London South Bank University, London South Bank University, Sat Dec 09 02:11:20 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS AU 50-1.6.2b:1995 © BSI 06-19993 Table 1 100 series tyre dimensions Design and in-service Nominal rim diameter codes 14, 15, 16, 17, 18 and 19 Dimensions in millimetres Tyre size designationab Measuring rim width code Design tyreIn-service Section width Overall diameter Maximum overall width Wmax Maximum overall diameter D0,max RmSDo Tread types A, B and C Tread type D Tread types A and Bc Tread types C and D 80/100 14 M/C 90/100 14 M/C 1.85 2.15 80 90 516 535 88 99 100 113 528 548 536 558 70/100 15 M/C 80/100 15 M/C 90/100 15 M/C 1.60 1.85 2.15 69 80 90 521 541 561 76 88 99 86 100 113 531 553 573 537 561 583 70/100 16 80/100 16 90/100 16 100/100 16 130/100 16 140/100 16 1.60 1.85 2.15 2.50 3.00 3.50 69 80 90 101 129 142 546 566 586 606 666 686 76 88 99 111 142 156 86 100 113 126 161 178 556 578 598 620 684 706 562 586 608 630 698 720 70/100 17 80/100 17 90/100 17 100/100 17 110/100 17 120/100 17 130/100 17 1.60 1.85 2.15 2.50 2.50 2.75 3.00 69 80 90 101 109 119 129 572 592 612 632 652 672 692 76 88 99 111 120 131 142 86 100 113 126 136 149 161 582 604 624 646 668 588 710 588 612 634 656 678 700 724 70/100 18 80/100 18 90/100 18 100/100 18 110/100 18 120/100 18 130/100 18 1.60 1.85 2.15 2.50 2.50 2.75 3.00 69 80 90 101 109 119 129 597 617 637 657 677 697 717 76 88 99 111 120 131 142 86 100 113 126 136 149 161 607 629 649 671 693 713 735 613 637 659 681 703 725 749 70/100 19 80/100 19 90/100 19 100/100 19 110/100 19 120/100 19 130/100 19 1.60 1.85 2.15 2.50 2.50 2.75 3.00 69 80 90 101 109 119 129 623 643 663 683 703 723 743 76 88 99 111 120 131 142 86 100 113 126 136 149 161 633 655 675 697 719 739 761 639 663 685 707 729 751 775 a In the case of radial construction, the tyre size designation is completed by the letter “R” in place of the dash “” (e.g. 80/100 R 14 M/C). b For nominal rim diameter codes 13 up to 19 inclusive, it is recommended to add the suffix “M/C” to the tyre size designation. c Maximum overall diameters for tread types A and B are related to service up to 150 km/h. Licensed Copy: London South Bank University, London South Bank University, Sat Dec 09 02:11:20 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS AU 50-1.6.2b:1995 4 © BSI 06-1999 Table 2 100 series tyre dimensions Design and in-service Nominal rim diameter codes 8, 10 and 12 Dimensions in millimetres Tyre size designationa Measuring rim