1、BSI Standards PublicationBS ISO 4000-1:2015Passenger car tyres and rimsPart 1: Tyres (metric series)BS ISO 4000-1:2015 BRITISH STANDARDNational forewordThis British Standard is the UK implementation of ISO 4000-1:2015. Itsupersedes BS ISO 4000-1:2013 which is withdrawn.The UK participation in its pr
2、eparation was entrusted to TechnicalCommittee AUE/4, Tyres and wheels for motor vehicles.A list of organizations represented on this committee can beobtained on request to its secretary.This publication does not purport to include all the necessaryprovisions of a contract. Users are responsible for
3、its correctapplication. The British Standards Institution 2015.Published by BSI Standards Limited 2015ISBN 978 0 580 84901 5ICS 83.160.10Compliance with a British Standard cannot confer immunity fromlegal obligations.This British Standard was published under the authority of theStandards Policy and
4、Strategy Committee on 31 October 2015.Amendments/corrigenda issued since publicationDate T e x t a f f e c t e dBS ISO 4000-1:2015 ISO 2015Passenger car tyres and rims Part 1: Tyres (metric series)Pneus et jantes pour voitures particulires Partie 1: Pneumatiques (srie millimtrique)INTERNATIONAL STAN
5、DARDISO4000-1Eleventh edition2015-09-15Reference numberISO 4000-1:2015(E)BS ISO 4000-1:2015ISO 4000-1:2015(E)ii ISO 2015 All rights reservedCOPYRIGHT PROTECTED DOCUMENT ISO 2015, Published in SwitzerlandAll rights reserved. Unless otherwise specified, no part of this publication may be reproduced or
6、 utilized otherwise in any form or by any means, electronic or mechanical, including photocopying, or posting on the internet or an intranet, without prior written permission. Permission can be requested from either ISO at the address below or ISOs member body in the country of the requester.ISO cop
7、yright officeCh. de Blandonnet 8 CP 401CH-1214 Vernier, Geneva, SwitzerlandTel. +41 22 749 01 11Fax +41 22 749 09 47copyrightiso.orgwww.iso.orgBS ISO 4000-1:2015ISO 4000-1:2015(E)Foreword iv1 Scope . 12 Normative references 13 Terms and definitions . 14 Designation 14.1 Size and construction 14.1.1
8、Characteristics . 14.1.2 Nominal section width 14.1.3 Nominal aspect ratio 24.1.4 Tyre construction code . 24.1.5 Nominal rim diameter code . 24.2 Service description 34.2.1 General 34.2.2 Load index . 34.2.3 Speed categories 34.3 Other service characteristics 35 Marking 66 Tyre dimensions . 76.1 Ro
9、unding values . 76.2 Calculation of design tyre dimensions 76.2.1 Theoretical rim width, Rth76.2.2 Measuring rim width code, Rmc.76.2.3 Design tyre section width, S 86.2.4 Design tyre section height, H 86.2.5 Design tyre overall diameter, Do86.2.6 Guidelines 86.3 Calculation of maximum overall (grow
10、n) tyre dimensions in service tyres mounted on their measuring rims . 86.3.1 General 86.3.2 Maximum overall (grown) width in service, Wmax.96.3.3 Maximum overall (grown) diameter in service, Do max.96.4 Calculation of minimum tyre dimensions for radial ply tyres mounted on their measuring rims . 96.
11、4.1 Minimum tyre section width, Smin.96.4.2 Minimum tyre overall diameter, Do min.96.5 Range of approved rims . 107 Tyre dimension measurement procedure 108 Inflation pressures 109 Load capacities 1110 Choice of tyre sizes 1111 Camber angle .12Annex A (normative) Guideline values for metric-series t
12、yres .14Annex B (normative) Load indices for passenger car tyres 21Annex C (normative) Minimum inflation pressure for intermediate load 43Annex D (informative) Other existing size markings .51Bibliography .53 ISO 2015 All rights reserved iiiContents PageBS ISO 4000-1:2015ISO 4000-1:2015(E)ForewordIS
13、O (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 co
14、mmittee 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 electro
15、technical standardization.The procedures used to develop this document and those intended for its further maintenance are described in the ISO/IEC Directives, Part 1. In particular the different approval criteria needed for the different types of ISO documents should be noted. This document was draf
16、ted in accordance with the editorial rules of the ISO/IEC Directives, Part 2 (see www.iso.org/directives). 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 ri
17、ghts. Details of any patent rights identified during the development of the document will be in the Introduction and/or on the ISO list of patent declarations received (see www.iso.org/patents). Any trade name used in this document is information given for the convenience of users and does not const
18、itute an endorsement.For an explanation on the meaning of ISO specific terms and expressions related to conformity assessment, as well as information about ISOs adherence to the WTO principles in the Technical Barriers to Trade (TBT) see the following URL: Foreword - Supplementary informationThe com
19、mittee responsible for this document is ISO/TC 31, Tyres, rims and valves, Subcommittee SC 3, Passenger car tyres and rims.This eleventh edition of ISO 4000-1 cancels and replaces the tenth edition (ISO 4000-1:2013), which has been technically revised.ISO 4000 consists of the following parts, under
20、the general title Passenger car tyres and rims: Part 1: Tyres (metric series) Part 2: Rimsiv ISO 2015 All rights reservedBS ISO 4000-1:2015INTERNATIONAL STANDARD ISO 4000-1:2015(E)Passenger car tyres and rims Part 1: Tyres (metric series)1 ScopeThis part of ISO 4000 specifies the designation, dimens
21、ions, and load ratings of metric-series tyres primarily intended for passenger cars.2 Normative referencesThe following documents, in whole or in part, are normatively referenced in this document and are indispensable for its application. For dated references, only the edition cited applies. For und
22、ated references, the latest edition of the referenced document (including any amendments) applies.ISO 3877-1, Tyres, valves and tubes List of equivalent terms Part 1: TyresISO 4223-1, Definitions of some terms used in the tyre industry Part 1: Pneumatic tyresISO 16992, Passenger car tyres Spare unit
23、 substitutive equipment (SUSE)3 Terms and definitionsFor the purposes of this document, the terms and definitions given in ISO 4223-1, ISO 3877-11), and the following apply.3.1rim protectorfeature incorporated into the lower sidewall area of the tyre which is intended to protect the rim flange from
24、damageEXAMPLE A protruding circumferential rubber rib.4 Designation4.1 Size and construction4.1.1 CharacteristicsThe tyre characteristics shall be designated as follows:Nominal section width / Nominal aspect ratio Tyre construction code Nominal rim diameter code4.1.2 Nominal section widthThe nominal
25、 section width of the tyre shall be indicated in millimetres, and this part of the designation shall end in either the numeral of zero or five, so that in any single series of tyres with the same nominal aspect ratio, the values shall all end in 0 or they shall all end in 5.1) )ISO 3877-1 gives othe
26、r terms used in this field, together with their equivalents in other languages. ISO 2015 All rights reserved 1BS ISO 4000-1:2015ISO 4000-1:2015(E)For sizes mounted on 5 tapered (code-designated) rims, the nominal section width designation shall end in 5.4.1.3 Nominal aspect ratioThe nominal aspect r
27、atio (H/S) shall be expressed as a percentage and shall be a multiple of 5.4.1.4 Tyre construction codeThe tyre construction code shall be as follows: B for bias-belted construction; D for diagonal construction; R for radial ply construction.In the case of tyres designed for vehicles having a maximu
28、m speed capability exceeding 240 km/h, the code-letters ZR can be indicated with the dimensional and constructional characteristics for radial ply tyres instead of the tyre construction code R (see 4.2).The code-letters ZR shall be used in the dimensional and constructional characteristics associate
29、d with the speed symbol Y and the load index, both placed within parentheses, to identify performance up to 300 km/h for tyres suitable for speeds exceeding 300 km/h.EXAMPLE 235/45 ZR 17 (97Y).For maximum speed capability and load capacity of the tyre over 300 km/h, consult the manufacturer.Use of a
30、ny other code-letter (for example, in the case of a new construction type) should first be submitted to ISO for acceptance.4.1.5 Nominal rim diameter codeFor tyres mounted on 5 tapered (code-designated) rims, the code shall be as given in Table 1.Table 1 Nominal rim diameter codeNominal rim diameter
31、 codeNominal rim diameter Drmm10 25412 30513 33014 35615 38116 40617 43218 45719 48320 50821 53322 55923 58424 6102 ISO 2015 All rights reservedBS ISO 4000-1:2015ISO 4000-1:2015(E)Nominal rim diameter codeNominal rim diameter Drmm25 63526 66028 71130 762In the case of tyres requiring new-concept rim
32、s, for safety reasons, especially concerning mounting, the code-number shall be equal to the nominal rim diameter (Dr) expressed as a whole number in millimetres.4.2 Service description4.2.1 GeneralThe service description shall be as follows:Load index Speed symbolIn the special case of tyres design
33、ed for vehicles having a maximum speed capability exceeding 300 km/h, the service description does not need to be indicated. However, the tyre manufacturer shall be consulted for the maximum speed capability and load capacity of such tyres.4.2.2 Load indexThe maximum tyre load-carrying capacity corr
34、esponding to the service conditions specified by the tyre manufacturer shall be indicated by a load index taken from Table 2, per tyre for a single mounting.4.2.3 Speed categoriesA speed category is assigned to a tyre according to the maximum speed for which its use is rated. The speed for each cate
35、gory shall be indicated by a letter-symbol, in accordance with Table 3.4.3 Other service characteristics4.3.1 The word “TUBELESS” shall appear on tyres without tubes.4.3.2 The letters “XL”, close to the tyre size designation, or the words “REINFORCED” or “EXTRA LOAD” shall appear on tyres designed f
36、or loads and inflation pressures higher than the standard version.4.3.3 The letters “LL”, close to the tyre size designation, or the words “LIGHT LOAD” shall appear on the sidewalls of tyres designed for loads lower than the standard version.4.3.4 The letter “T”, immediately preceding the tyre size
37、designation, shall be used to characterize high-pressure, special, temporary-use spare tyres.4.3.5 Specific indications, if required, can be added to indicate: the type of vehicle for which the tyre is primarily designed, using the symbol “P” for passenger cars (see 4.3.6); temporary use of certain
38、spare tyres, using indications such as “TEMPORARY USE ONLY”; bias-belted construction, with the words “BIAS-BELTED”;Table 1 (continued) ISO 2015 All rights reserved 3BS ISO 4000-1:2015ISO 4000-1:2015(E) radial ply construction, with the word “RADIAL”; direction of mounting; direction of rotation; ty
39、pe of tread pattern; other characteristics.4.3.6 The optional marking “P” can be used where there could be ambiguity regarding the tyre type. It should be positioned such that confusion cannot result from its proximity to any other service condition marking.EXAMPLE P295/45 R 17.4.3.7 The optional ma
40、rking “F” shall be added after the construction code to identify self-supporting-type run-flat tyres that meet the requirements of ISO 16992.EXAMPLE 235/45 RF 17.4 ISO 2015 All rights reservedBS ISO 4000-1:2015ISO 4000-1:2015(E)Table 2 Correlation between load index (LI) and tyre load-carrying capac
41、ity (TLCC)LITLCC kgLITLCC kgLITLCC kgLITLCC kg50 190 70 335 90 600 110 1 06051 195 71 345 91 615 111 1 09052 200 72 355 92 630 112 1 12053 206 73 365 93 650 113 1 15054 212 74 375 94 670 114 1 18055 218 75 387 95 690 115 1 21556 224 76 400 96 710 116 1 25057 230 77 412 97 730 117a1 28558 236 78 425
42、98 750 118a1 32059 243 79 437 99 775 119a1 36060 250 80 450 100 800 120a1 40061 257 81 462 101 825 62 265 82 475 102 850 63 272 83 487 103 875 64 280 84 500 104 900 65 290 85 515 105 925 66 300 86 530 106 950 67 307 87 545 107 975 68 315 88 560 108 1 000 69 325 89 580 109 1 030 aISO tyre loads have
43、a 116 load index maximum: some existing tyres can have a higher load index number.The maximum tyre load capacity corresponding to the load index shall apply for speeds up to and including 210 km/h.For tyres in the speed category V (between 210 km/h and 240 km/h), the maximum load capacity per tyre s
44、hall be reduced to 100 % at 210 km/h, 97 % at 220 km/h, 94 % at 230 km/h and 91 % at 240 km/h; linear interpolation is permitted.In the case of speed categories W and Y, the maximum load capacity per tyre corresponding to the load index shall apply for speeds up to and including 240 km/h for W and 2
45、70 km/h for Y.For tyres in the speed category W (between 240 km/h and 270 km/h), the maximum load capacity per tyre shall be reduced to 100 % at 240 km/h, 95 % at 250 km/h, 90 % at 260 km/h and 85 % at 270 km/h; linear interpolation is permitted.For tyres in the speed category Y (between 270 km/h an
46、d 300 km/h), the maximum load capacity per tyre shall be reduced to 100 % at 270 km/h, 95 % at 280 km/h, 90 % at 290 km/h and 85 % at 300 km/h; linear interpolation is permitted.See 4.2.3 and Table 3 for speed categories and their symbols.For speeds of over 300 km/h or ZR-marked tyres or both, consu
47、lt the tyre manufacturer for the maximum tyre load capacity permitted in relation to the maximum speed allowed for the tyre.For vehicles with a design maximum speed capability of up to 60 km/h, the maximum load capacity corresponding to the load index can be exceeded, as shown below. However, an inc
48、rease in the reference inflation pressure is necessary and should be determined in consultation with the tyre manufacturer. In the absence of such agreement, the following pressure increases are recommended: for 60 km/h, a 10 % load increase with a 10 kPa inflation pressure increase; for 50 km/h, a
49、15 % load increase with a 20 kPa inflation pressure increase; for 40 km/h, a 25 % load increase with a 30 kPa inflation pressure increase; for 30 km/h, a 35 % load increase with a 40 kPa inflation pressure increase; for 25 km/h, a 42 % load increase with a 50 kPa inflation pressure increase. ISO 2015 All rights reserved 5BS ISO 4000-1:2015ISO 4000-1:2015(E)Table 3 Speed symbolsSymbolCategory km/hJ 100K 110L 120M 130N 140P 150Q 160R 170S 180T 190U 200H 210V 240W 270Ya300NOTE This lis
