1、raising standards worldwideNO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAWBSI Standards PublicationBS ISO 5751-2:2010Motorcycle tyres and rims(metric series)Part 2: Tyre dimensions and load-carryingcapacitiesBS ISO 5751-2:2010 BRITISH STANDARDNational forewordThis British Stan
2、dard is the UK implementation of ISO 5751-2:2010. Itsupersedes BS ISO 5751-2:2004 which is withdrawn.The UK participation in its preparation was entrusted to TechnicalCommittee AUE/4, Tyres and wheels for motor vehicles.A list of organizations represented on this committee can beobtained on request
3、to its secretary.This publication does not purport to include all the necessaryprovisions of a contract. Users are responsible for its correctapplication. BSI 2010ISBN 978 0 580 67625 3ICS 43.140; 83.160.10Compliance with a British Standard cannot confer immunity fromlegal obligations.This British S
4、tandard was published under the authority of theStandards Policy and Strategy Committee on 30 November 2010.Amendments issued since publicationDate Text affectedBS ISO 5751-2:2010Reference numberISO 5751-2:2010(E)ISO 2010INTERNATIONAL STANDARD ISO5751-2Sixth edition2010-11-15Motorcycle tyres and rim
5、s (metric series) Part 2: Tyre dimensions and load-carrying capacities Pneumatiques et jantes pour motocycles (sries millimtriques) Partie 2: Cotes et capacits de charge des pneumatiques BS ISO 5751-2:2010ISO 5751-2:2010(E) PDF disclaimer This PDF file may contain embedded typefaces. In accordance w
6、ith Adobes licensing policy, this file may be printed or viewed but shall not be edited unless the typefaces which are embedded are licensed to and installed on the computer performing the editing. In downloading this file, parties accept therein the responsibility of not infringing Adobes licensing
7、 policy. The ISO Central Secretariat accepts no liability in this area. Adobe is a trademark of Adobe Systems Incorporated. Details of the software products used to create this PDF file can be found in the General Info relative to the file; the PDF-creation parameters were optimized for printing. Ev
8、ery care has been taken to ensure that the file is suitable for use by ISO member bodies. In the unlikely event that a problem relating to it is found, please inform the Central Secretariat at the address given below. COPYRIGHT PROTECTED DOCUMENT ISO 2010 All rights reserved. Unless otherwise specif
9、ied, no part of this publication may be reproduced or utilized in any form or by any means, electronic or mechanical, including photocopying and microfilm, without permission in writing from either ISO at the address below or ISOs member body in the country of the requester. ISO copyright office Cas
10、e postale 56 CH-1211 Geneva 20 Tel. + 41 22 749 01 11 Fax + 41 22 749 09 47 E-mail copyrightiso.org Web www.iso.org Published in Switzerland ii ISO 2010 All rights reservedBS ISO 5751-2:2010ISO 5751-2:2010(E) ISO 2010 All rights reserved iiiContents Page Foreword iv 1 Scope1 2 Normative references1
11、3 Terms and definitions .1 4 Tyre designation1 4.1 General .1 4.2 Tyre construction code.1 4.3 Other markings 2 5 Tyre dimensions2 5.1 General .2 5.2 Measuring procedure2 6 Tread configurations.3 7 Load ratings .3 7.1 General .3 7.2 Load capacity at reduced speeds3 7.3 Load capacity at speeds higher
12、 than 210 km/h3 8 Inflation pressures 4 Annex A (informative) Harmonized load indices .28 Bibliography34 BS ISO 5751-2:2010ISO 5751-2:2010(E) iv ISO 2010 All rights reservedForeword ISO (the International Organization for Standardization) is a worldwide federation of national standards bodies (ISO m
13、ember 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, governm
14、ental 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 Dir
15、ectives, Part 2. The main task of technical committees is to prepare International Standards. 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 bo
16、dies casting a vote. Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. ISO shall not be held responsible for identifying any or all such patent rights. ISO 5751-2 was prepared by Technical Committee ISO/TC 31, Tyres, rims and valves
17、, Subcommittee SC 10, Cycle, moped, motorcycle tyres and rims. This sixth edition cancels and replaces the fifth edition (ISO 5751-2:2004), which has been technically revised. ISO 5751 consists of the following parts, under the general title Motorcycle tyres and rims (metric series): Part 1: Design
18、guides Part 2: Tyre dimensions and load-carrying capacities Part 3: Range of approved rim contours BS ISO 5751-2:2010INTERNATIONAL STANDARD ISO 5751-2:2010(E) ISO 2010 All rights reserved 1Motorcycle tyres and rims (metric series) Part 2: Tyre dimensions and load-carrying capacities 1 Scope This par
19、t of ISO 5751 specifies the tyre size designation, dimensions and load-carrying capacities of metric series motorcycle tyres. It is applicable to such tyres with a height-to-width ratio of 100 % and below. NOTE See ISO 4249 for motorcycle tyres and rims (code-designated series) of rim diameter codes
20、 13 and above, and ISO 6054 for those of codes 12 and below. 2 Normative references The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (
21、including any amendments) applies. ISO 4223-1, Definitions of some terms used in the tyre industry Part 1: Pneumatic tyres ISO 5751-1, Motorcycle tyres and rims (metric series) Part 1: Design guides ISO 5751-3, Motorcycle tyres and rims (metric series) Part 3: Range of approved rim contours 3 Terms
22、and definitions For the purposes of this document, the terms and definitions given in ISO 4223-1 apply. 4 Tyre designation 4.1 General The tyre designation shall be as specified in ISO 5751-1, completed by the addition of the service description, i.e. load index and speed symbol. 4.2 Tyre constructi
23、on code The tables in this part of ISO 5751 show, as examples, tyre size designations for tyres in diagonal construction. However, a motorcycle tyre having, for example, a nominal section width of 100 mm, nominal aspect ratio of 90, nominal rim diameter code of 18 M/C, BS ISO 5751-2:2010ISO 5751-2:2
24、010(E) 2 ISO 2010 All rights reserved load-carrying capacity of 224 kg (corresponding to load index 56), and reference speed of 150 km/h (corresponding to speed symbol “P”), shall be marked, depending on its construction characteristics, as follows. Diagonal-ply construction: 100/90 18M/C 56 P Bias-
25、belted construction: 100/90 B 18M/C 56 P Radial-ply construction: 100/90 R 18M/C 56 P NOTE For tyres suitable for speeds greater than 240 km/h, see ISO 5751-1. 4.3 Other markings For tyres having a nominal rim diameter code of 16 M/C or higher, the suffix M/C is not required if the tyre was manufact
26、ured before May 2003. Extra-load version tyres shall be additionally marked either “Extra Load” or “REINF” (for reinforced). 5 Tyre dimensions 5.1 General Tables 1 to 14 present the a) tyre size designation, b) measuring rim width code, c) design tyre dimensions, i.e. section width and overall diame
27、ter, and d) maximum tyre dimensions in service, i.e. overall width and diameter for the various types of tread configuration (see Clause 6) to be considered by vehicle manufacturers in designing for tyre clearances. NOTE The maximum dimensions in service do not include the values of the centrifugal
28、radius (see ISO 5751-1). 5.2 Measuring procedure Mount the tyre on a chosen rim according to ISO 5751-3, approved for the respective tyre size and ready for fitting. Inflate as follows. a) For normal-load version tyres: 225 kPa for speed symbols “S” and lower; 280 kPa for speed symbols “T” and highe
29、r. b) For extra-load version tyres: 280 kPa for speed symbols “P” and lower; 330 kPa for speed symbols “Q” and higher. c) For light-load version tyres: 175 kPa. BS ISO 5751-2:2010ISO 5751-2:2010(E) ISO 2010 All rights reserved 3Allow the tyre to stand for 24 h at normal room temperature, then readju
30、st the inflation pressures to those specified in a), b) and c), before performing the measurements. When measuring on rims having a rim width code that differs from that of the measuring rim width code given in the tables of this part of ISO 5751, the section-width and overall-width values of the ty
31、re used for comparison with the data given in Tables 1 to 14 shall be adjusted as follows: W = Wm+ 0,4 (R Rm) where Wm is the value measured; Rmis the width, expressed in millimetres, of the rim used for the measurements; R is the width, expressed in millimetres, of the measuring rim width code give
32、n in the tables. 6 Tread configurations ISO 5751-1:, Figure 1, shows various tread configurations. The following attributions of tread-type configurations to the type of service are to be considered as examples only. The choice of a given tread-type configuration for a given tyre is at the discretio
33、n of the tyre manufacturer alone. Tread type A is commonly adopted for highway-service low-speed tyres; tread type B is commonly adopted for highway-service high-speed tyres; tread type C is commonly adopted for tyres used in both on- and off-road service; tread type D is commonly adopted for tyres
34、exclusively in off-road service. 7 Load ratings 7.1 General Tables 15 to 29 show the standardized maximum tyre load-carrying capacity for each given tyre size designation. 7.2 Load capacity at reduced speeds Subject to acceptance by the tyre manufacturer and taking into account the conditions of use
35、 of the motorcycle, the load capacities corresponding to the load indices indicated in Tables 15 to 29 may be modified by the percentages given in Table 30. This modification is possible when the maximum speed of motorcycle is different from the one associated with the speed symbol. 7.3 Load capacit
36、y at speeds higher than 210 km/h For the load-carrying capacities of tyres marked with speed symbols “V” or “W” operating at speeds higher than 210 km/h, see ISO 5751-1. BS ISO 5751-2:2010ISO 5751-2:2010(E) 4 ISO 2010 All rights reserved8 Inflation pressures The following inflation pressures are giv
37、en as guidelines only. 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, location of the tyre, operating conditions and mechanical chara
38、cteristics of the vehicle. The maximum load-carrying capacity corresponds to the following inflation pressures. a) For nominal rim diameter codes up to and including 12 (for series 80 and above): 1) light-load version: 175 kPa 2) normal-load version: 250 kPa 3) extra-load version: 300 kPa b) For nom
39、inal rim diameter codes 13 and above (for series 70 and below, and also for nominal rim diameter codes 12 and below): 1) light-load version: 175 kPa 2) normal-load version: for tyres marked with a speed symbol up to and including “P” 225 kPa for tyres marked with a speed symbol “Q”, “R” or “S” 250 k
40、Pa for tyres marked with a speed symbol “T”, “U” or “H” 280 kPa for tyres marked with a speed symbol “V” or “W” 290 kPa 3) extra-load version: increase the inflation pressure for the normal-load version by 50 kPa. BS ISO 5751-2:2010ISO 5751-2:2010(E) ISO 2010 All rights reserved 5Table 1 Tyre dimens
41、ions (design and in-service) 100 series tyres with nominal rim diameter codes 13 and above Dimensions in millimetres Design tyre In-service Maximum overall width WmaxMaximum overall diameterb Do,maxTyre size designationaMeasuring rim width code Section width S Overall diameterDoTread types A, B and
42、CcTread types A, B and CdTread type D Tread types A and B Tread types C and D 50/100 14 M/C 60/100 14 M/C 70/100 14 M/C 80/100 14 M/C 90/100 14 M/C 1.20 1.40 1.60 1.85 2.15 50 60 69 80 90 456 476 496 516 536 54 64 74 86 96 55 66 76 88 99 63 75 86 100 113 464 484 506 528 548 468 490 514 536 558 70/10
43、0 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 74 86 96 76 88 99 86 100 113 531 553 573 537 561 583 60/100 16 M/C 70/100 16 M/C 80/100 16 M/C 90/100 16 M/C 100/100 16 M/C 130/100 16 M/C 140/100 16 M/C 1.40 1.60 1.85 2.15 2.50 3.00 3.50 60 69 80 90 101 129 142 526 546 566 58
44、6 606 666 686 64 74 86 96 108 138 152 66 76 88 99 111 142 156 75 86 100 113 126 161 178 534 556 578 598 620 684 706 540 562 586 608 630 698 720 50/100 17 M/C 60/100 17 M/C 70/100 17 M/C 80/100 17 M/C 90/100 17 M/C 100/100 17 M/C 110/100 17 M/C 120/100 17 M/C 130/100 17 M/C 1.20 1.40 1.60 1.85 2.15 2
45、.50 2.50 2.75 3.00 50 60 69 80 90 101 109 119 129 532 552 572 592 612 632 652 672 692 54 64 74 86 96 108 117 127 138 55 66 76 88 99 111 120 131 142 63 75 86 100 113 126 136 149 161 540 560 582 604 624 646 668 688 710 544 566 588 612 634 656 678 700 724 70/100 18 M/C 80/100 18 M/C 90/100 18 M/C 100/1
46、00 18 M/C 110/100 18 M/C 120/100 18 M/C 130/100 18 M/C 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 74 86 96 108 117 127 138 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 M/C 80/100 19
47、M/C 90/100 19 M/C 100/100 19 M/C 110/100 19 M/C 120/100 19 M/C 130/100 19 M/C 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 74 86 96 108 117 127 138 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 9
48、0/100 20 M/C 2.15 90 688 96 99 113 700 710 70/100 21 M/C 80/100 21 M/C 90/100 21 M/C 1.60 1.85 2.15 69 80 90 673 693 713 74 86 96 76 88 99 86 100 113 683 705 725 689 713 735 aFor appropriate tyre size designation, see Clause 4. b Maximum overall diameters are related to service up to 150 km/h. c Rad
49、ial-ply tyres. d Diagonal-ply and bias-belted tyres. BS ISO 5751-2:2010ISO 5751-2:2010(E) 6 ISO 2010 All rights reservedTable 2 Tyre dimensions (design and in-service) 100 series tyres with nominal rim diameter codes 12 and below Dimensions in millimetres Design tyre In-servicebTyre size designationaMeasuring rim width code Section width S Overall diameterDoMaximum overall width WmaxMaximum overall
