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1、BRITISH STANDARD BS ISO 5751-2:2004 Motorcycle tyres and rims (metric series) Part 2: Tyre dimensions and load-carrying capacities ICS 43.140; 83.160.10 ? Licensed Copy: sheffieldun sheffieldun, na, Sun Nov 26 14:13:29 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS ISO 5751-2:2004 This British Standa
2、rd was published under the authority of the Standards Policy and Strategy Committee on 15 December 2004 BSI 15 December 2004 ISBN 0 580 45082 1 National foreword This British Standard reproduces verbatim ISO 5751-2:2004 and implements it as the UK national standard. It supersedes BS AU 50-1.6.2c:200
3、2 which is withdrawn. The UK participation in its preparation was entrusted to Technical Committee AUE/4, Tyres and wheels for motor vehicles, which has the responsibility to: A list of organizations represented on this committee can be obtained on request to its secretary. Cross-references The Brit
4、ish Standards which implement international publications referred to in this document may be found in the BSI Catalogue under the section entitled “International Standards Correspondence Index”, or by using the “Search” facility of the BSI Electronic Catalogue or of British Standards Online. This pu
5、blication does not purport to include all the necessary provisions of a contract. Users are responsible for its correct application. Compliance with a British Standard does not of itself confer immunity from legal obligations. aid enquirers to understand the text; present to the responsible internat
6、ional/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. Summary of pages This document comprises a front cover, an inside front cover, the ISO tit
7、le page, pages ii to iv, pages 1 to 30, an inside back cover and a back cover. The BSI copyright notice displayed in this document indicates when the document was last issued. Amendments issued since publication Amd. No. DateComments Licensed Copy: sheffieldun sheffieldun, na, Sun Nov 26 14:13:29 GM
8、T+00:00 2006, Uncontrolled Copy, (c) BSI Reference number ISO 5751-2:2004(E) INTERNATIONAL ADNATSDR ISO 5-1572 tide htfiFino -400251-11 Motorcycle tyres and rims (metric series) Part 2: Tyre dimensions and load-carrying capacities Pneumatiques et jantes pour motocycles (sries millimtriques) Partie 2
9、: Cotes et capacits de charge des pneumatiques Referecne unbmer OSI 2-1575002:)E(4 INTERNATIONAL STANDARD ISO 5751-2 Fifth edition 2004-11-15 crotoMyct elyreir dna sem( smtcir )seires :2 traP Tyre idnemsoins l dnaoadrrac-ying icapacseit Pnuematiuqes et jantes uopm rotolcyces s(riem sliilmtirques ) r
10、aPti:2 e toCse c tepacaist c edrahgd ese enpmuitauqse BS ISO 57512:2004 Licensed Copy: sheffieldun sheffieldun, na, Sun Nov 26 14:13:29 GMT+00:00 2006, Uncontrolled Copy, (c) BSI ii BS ISO 57512:2004 Licensed Copy: sheffieldun sheffieldun, na, Sun Nov 26 14:13:29 GMT+00:00 2006, Uncontrolled Copy, (
11、c) BSI iii Contents Page Forewordiv 1 Scope1 2 Normative references .1 3 Terms and definitions.1 4 Tyre designation .1 4.1 General.1 4.2 Tyre construction code 1 4.3 Other markings2 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
12、Load capacity at reduced speeds .3 7.3 Load capacity at speeds higher than 210 km/h .3 8 Inflation pressures3 Annex A (informative) Harmonized load indices.26 Bibliography .30 BS ISO 57512:2004 Licensed Copy: sheffieldun sheffieldun, na, Sun Nov 26 14:13:29 GMT+00:00 2006, Uncontrolled Copy, (c) BSI
13、 iv 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
14、 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 mat
15、ters of electrotechnical standardization. International Standards are drafted in accordance with the rules given in the ISO/IEC Directives, Part 2. The main task of technical committees is to prepare International Standards. Draft International Standards adopted by the technical committees are circu
16、lated to the member bodies for voting. Publication as an International Standard requires approval by at least 75 % of the member bodies 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 responsi
17、ble for identifying any or all such patent rights. ISO 5751-2 was prepared by Technical Committee ISO/TC 31, Tyres, rims and valves, Subcommittee SC 10, Cycle, moped, motorcycle tyres and rims. This fifth edition cancels and replaces the fourth edition (ISO 5751-2:2002), which has been technically r
18、evised. 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 BS ISO 57512:2004 Licensed Copy: sheffieldun sheffieldun, na, Sun Nov
19、 26 14:13:29 GMT+00:00 2006, Uncontrolled Copy, (c) BSI INTENRATIONAL TSANDADR IS-1575 O2:(4002E) 1 Motorcycle tyres and rims (metric series) Part 2: Tyre dimensions and load-carrying capacities 1 Scope This part of ISO 5751 specifies the tyre size designation, dimensions and load-carrying capacitie
20、s 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 13 and above, and ISO 6054 for those of codes 12 and below. 2 Normative references The f
21、ollowing 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 (including any amendments) applies. ISO 4223-1, Definitions of some terms used in the tyre
22、 industry Part 1: Pneumatic tyres ISO 5751-1:2004, 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 and definitions For the purposes of this document, the terms and definitions given i
23、n 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 construction code The tables in this part of ISO 5751 show, as examples, tyre size designation
24、s 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 57512:2004 Licensed Copy: sheffieldun sheffieldun, na, Sun Nov 26 14:13:29 GMT+00:00 2006, Uncontrolled Cop
25、y, (c) BSI 2 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-belted construction: 100/
26、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 16 M/C or higher, the suffix M/C is not required if the tyre was manufactured before May 2003. Extra-
27、load version tyres shall be additionally marked either “Extra Load” or “REINF” (for reinforced). 5 Tyre dimensions 5.1 General Tables 1 to 11 present the a) tyre size designation, b) measuring rim width code, c) design tyre dimensions, i.e. section width and overall diameter, and d) maximum tyre dim
28、ensions in service, i.e. overall width and diameter for the various types of tread configurations (see Clause 7) 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 radius (see ISO 5751-1). 5.
29、2 Measuring procedure Mount the tyre on a rim chosen 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 higher. b) For extra-load versio
30、n 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 57512:2004 Licensed Copy: sheffieldun sheffieldun, na, Sun Nov 26 14:13:29 GMT+00:00 2006, Uncontrolled Copy, (c) BSI 3 Allow the tyre to stand for 24 h at nor
31、mal room temperature, then readjust the inflation pressures to those specified above, 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-
32、width values of the tyre, used for comparison with the data given in Tables 1 to 11, shall be adjusted according to the formula: W = Wm + 0,4 (R Rm) where Wm is the value measured; Rm is the width, expressed in millimetres, of the rim used for the measurements; R is the width, expressed in millimetr
33、es, of the measuring rim width code given 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 configurati
34、on for a given tyre is at the discretion 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. Trea
35、d type D is commonly adopted for tyres exclusively in off-road service. 7 Load ratings 7.1 General Tables 12 to 23 show the standardized maximum tyre load-carrying capacity/capacities for each given tyre size designation. 7.2 Load capacity at reduced speeds Subject to acceptance by the tyre manufact
36、urer and taking into account the conditions of use of the motorcycle, the load capacities corresponding to the load indices indicated in Tables 12 to 23 may be modified by the percentages given in Table 24. This modification is possible when the motorcycle maximum speed is different from the one ass
37、ociated with the speed symbol. 7.3 Load capacity 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. 8 Inflation pressures The following inflation pressures are given as guidelines onl
38、y. 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 BS ISO 57512:2004 Licensed Copy: sheffieldun sheffieldun, na, Sun Nov 26 14:13:29 GMT+00:00 2006, Uncontrolled Copy, (c) BSI 4 also the tyre
39、 construction, road-holding, maximum speed, location of the tyre, operating conditions and mechanical characteristics 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
40、): 1) Light-load version: 175 kPa 2) Normal-load version: 250 kPa 3) Extra-load version: 300 kPa b) For nominal 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 wit
41、h a speed symbol up to and including “P” 225 kPa for tyres marked with speed symbol “Q”, “R” or “S” 250 kPa for tyres marked with speed symbol “T”, “U” or “H” 280 kPa for tyres marked with speed symbol “V” or “W” 290 kPa 3) Extra-load version: increase the inflation pressures for the normal-load ver
42、sion by 50 kPa. BS ISO 57512:2004 Licensed Copy: sheffieldun sheffieldun, na, Sun Nov 26 14:13:29 GMT+00:00 2006, Uncontrolled Copy, (c) BSI 5 Table 1 Tyre dimensions (design and in-service) 100 series tyres with nominal rim diameter codes 13 and above Dimensions in millimetres Design tyre In-servic
43、e Maximum overall width Wmax Maximum overall diameter b Do,max Tyre size designation a Measuring rim width code Section width S Overall diameter Do Tread types A, B and C c Tread types A, B and C d Tread type D Tread types A and B Tread types C and D 60/100 14 M/C 70/100 14 M/C 80/100 14 M/C 90/100
44、14 M/C 1.50 1.60 1.85 2.15 61 69 80 90 476 496 516 536 65 74 86 96 67 76 88 99 76 86 100 113 484 506 528 548 490 514 536 558 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 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
45、/100 16 M/C 100/100 16 M/C 130/100 16 M/C 140/100 16 M/C 1.50 1.60 1.85 2.15 2.50 3.00 3.50 61 69 80 90 101 129 142 526 546 566 586 606 666 686 65 74 86 96 108 138 152 67 76 88 99 111 142 156 76 86 100 113 126 161 178 534 556 578 598 620 684 706 540 562 586 608 630 698 720 60/100 17 M/C 70/100 17 M/
46、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 1.50 1.60 1.85 2.15 2.50 2.50 2.75 3.00 61 69 80 90 101 109 119 129 552 572 592 612 632 652 672 692 65 74 86 96 108 117 127 138 67 76 88 99 111 120 131 142 76 86 100 113 126 136 149 161 560 582 604 624 646 668
47、588 710 566 588 612 634 656 678 700 724 70/100 18 M/C 80/100 18 M/C 90/100 18 M/C 100/100 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 1
48、49 161 607 629 649 671 693 713 735 613 637 659 681 703 725 749 70/100 19 M/C 80/100 19 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 1
49、42 86 100 113 126 136 149 161 633 655 675 697 719 739 761 639 663 685 707 729 751 775 70/100 21 M/C 80/100 21 M/C 1.60 1.85 69 80 673 693 74 86 76 88 86 100 683 705 689 713 a For appropriate tyre size designation, see Clause 4. b Maximum overall diameters are related to service up to 150 km/h. c Radial-ply tyres. d Diagonal-ply and bias-belted tyres. BS ISO