1、BSI Standards PublicationBS ISO 5775-1:2014Bicycle tyres and rimsPart 1: Tyre designations and dimensionsBS ISO 5775-1:2014 BRITISH STANDARDNational forewordThis British Standard is the UK implementation of ISO 5775-1:2014. Itsupersedes BS 6102-5:1998 which is withdrawn.The UK participation in its p
2、reparation was entrusted to TechnicalCommittee GME/25, Cycles.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 its correctapplication. The
3、 British Standards Institution 2014. Published by BSI StandardsLimited 2014ISBN 978 0 580 71499 3ICS 43.150; 83.160.10Compliance with a British Standard cannot confer immunity fromlegal obligations.This British Standard was published under the authority of theStandards Policy and Strategy Committee
4、on 30 September 2014.Amendments issued since publicationDate Text affectedBS ISO 5775-1:2014 ISO 2014Bicycle tyres and rims Part 1: Tyre designations and dimensionsPneumatiques et jantes pour bicyclettes Partie 1: Dsignation et cotes des pneumatiquesINTERNATIONAL STANDARDISO5775-1Sixth edition2014-0
5、9-01Reference numberISO 5775-1:2014(E)BS ISO 5775-1:2014ISO 5775-1:2014(E)ii ISO 2014 All rights reservedCOPYRIGHT PROTECTED DOCUMENT ISO 2014All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized otherwise in any form or by any means, electronic o
6、r 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 copyright officeCase postale 56 CH-1211 Geneva 20Tel. + 41 22 74
7、9 01 11Fax + 41 22 749 09 47E-mail copyrightiso.orgWeb www.iso.orgPublished in SwitzerlandBS ISO 5775-1:2014ISO 5775-1:2014(E) ISO 2014 All rights reserved iiiContents PageForeword iv1 Scope . 12 Normative references 13 Terms and definitions . 14 “Wired edge” tyres mounted on straight side or crotch
8、et type rims . 24.1 Tyre designation 34.2 Tyre dimensions 34.3 Tread configurations . 104.4 Tyre dimension measurement method 114.5 Recommended rim contours . 114.6 Minimum inflation pressure . 115 “Beaded edge” tyres mounted on hooked bead rims.125.1 Tyre designation . 135.2 Tyre dimensions . 135.3
9、 Tyre dimension measurement method 155.4 Tyres than can be mounted on both hooked bead and straight side rims .15Annex A (informative) Old marking .16BS ISO 5775-1:2014ISO 5775-1:2014(E)ForewordISO (the International Organization for Standardization) is a worldwide federation of national standards b
10、odies (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 committee has been established has the right to be represented on that committee. International organizati
11、ons, 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 electrotechnical standardization.The procedures used to develop this document and those intended for its furthe
12、r 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 drafted in accordance with the editorial rules of the ISO/IEC Directives, Part 2 (see www.iso.org/directives
13、).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. Details of any patent rights identified during the development of the document will be in the Intro
14、duction 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 constitute an endorsement.For an explanation on the meaning of ISO specific terms and expressions related to co
15、nformity 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 committee responsible for this document is ISO/TC 31, Tyres, rims, and valves, Subcommittee SC 10, Cycle, mop
16、ed, motorcycle tyres, and rims.This sixth edition cancels and replaces the fifth edition (ISO 5775-1:1997), which has been technically revised.ISO 5775 consists of the following parts, under the general title Bicycle tyres and rims: Part 1: Tyre designations and dimensions Part 2: Rimsiv ISO 2014 Al
17、l rights reservedBS ISO 5775-1:2014INTERNATIONAL STANDARD ISO 5775-1:2014(E)Bicycle tyres and rims Part 1: Tyre designations and dimensions1 ScopeThis part of ISO 5775 specifies the designations and dimensions for the following pneumatic bicycle tyres: “wired edge” tyres mounted on straight side or
18、crotchet type rims; “beaded edge” tyres mounted on hooked bead rims.Tubular sew-up tyres and non-pneumatic tyres are not covered by this part of ISO 5775.2 Normative referencesThe following documents, in whole or in part, are normatively referenced in this document and are indispensable for its appl
19、ication. 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 industry Part 1: Pneumatic tyresISO 5775-2, Bicycle tyres and rims Part 2: Ri
20、ms3 Terms and definitionsFor the purposes of this part of ISO 5775, the terms and definitions given in ISO 4223-1 apply. ISO 2014 All rights reserved 1BS ISO 5775-1:2014ISO 5775-1:2014(E)4 “Wired edge” tyres mounted on straight side or crotchet type rimsKey1 tread 8 specified rim diameter (D)2 secti
21、on width (S) 9 bead base3 maximum overall width (W) 10 rim4 crown thickness 11 measuring rim width (Rm)5 section height (H) 12 steel bead wire6 side wall 13 side wall engraving or decorative pattern7 maximum overall diameter (Do)Figure 1 Typical section of a cycle tyre showing components and nomencl
22、atureNOTE For tyres that could be mounted on both straight side and hooked bead rims, see 5.4.2 ISO 2014 All rights reservedBS ISO 5775-1:2014ISO 5775-1:2014(E)4.1 Tyre designationThe tyre designation for straight side and crotchet type rims shall be shown on the sidewall of the tyre and shall inclu
23、de the marking given in 4.1.1 to 4.1.4.4.1.1 Tyre size designationThe characteristics shall be indicated as follows:Nominal section width Tyre construction code Nominal rim diameter4.1.1.1 Nominal section widthThe nominal section width of the tyre shall be expressed in millimetres.4.1.1.2 Tyre const
24、ruction codeThe tyre construction code shall be a separated dash.NOTE Other codes will be established for new concepts of tyres.4.1.1.3 Nominal rim diameterThe nominal rim diameter shall be expressed in millimetres.4.1.2 Old markingTo help customers in those countries where other systems of marking
25、were used, the old marking(s) may be added in parentheses before or after the tyre size designation.It is suggested that characters smaller than those used for the designation specified in 4.1.1 be adopted. See Annex A for correspondence between “tyre size designation” and “old markings”. Sizes not
26、included in Annex A shall bear the tyre size designation only.4.1.3 Other service characteristics4.1.3.1 In the case of tubeless tyres, the marking “TUBELESS” shall be shown on the tyre.4.1.3.2 In the case of a preferred direction of rotation of the tyre, an arrow shall be used to indicate that dire
27、ction.4.1.3.3 Specific indications, if required, may be added to indicate the following:a) the recommended or the maximum inflation pressure, in kilopascals;b) other characteristics.4.1.4 ExampleA tyre having nominal section width 32 mm, nominal rim diameter 597 mm, and recommended inflation pressur
28、e of 400 kPa shall be marked as follows:32 597 inflate to 400 kPa4.2 Tyre dimensionsSee Figure 1 for tread and tyre dimensions. ISO 2014 All rights reserved 3BS ISO 5775-1:2014ISO 5775-1:2014(E)4.2.1 Calculation of “design tyre” dimensions4.2.1.1 Theoretical rim width, RthThe theoretical rim width,
29、Rth, is equal to the product of the nominal section width, SN, by the rim/section ratio, K1, as shown in Formula (1):RKSth 1N= (1)NOTE For tyres with SN 30, K1= 0,65. For tyres with SN 30, K1= 0,55.4.2.1.2 Measuring rim width, RmThe measuring rim width, Rm, is the width of the existing rim nearest t
30、o the theoretical rim width, Rth. See ISO 5775-2 for existing rim widths.4.2.1.3 Design tyre section width, SThe design tyre section width, S, is the nominal section width, SN, transferred from the theoretical rim width, Rth, to the measuring rim width, Rm, as shown in Formula (2):SS KR R=+ ()n2mth(
31、2)rounded to the nearest whole number.NOTE For tyres existing concepts, K2= 0,4.4.2.1.4 Design tyre section height, HThe design tyre section, H, is equal to the following: the nominal section width +4 mm when SN35 S + 3D all SNS + 8This includes protective ribs, lettering, embellishments, manufactur
32、ing tolerances, and growth due to service.4.2.2.2 Maximum overall diameter in service, Do,maxThe maximum overall diameter in service, Do,max, is equal to the nominal rim diameter, Dr, plus twice the design tyre section height, H, plus a value as follows: Do,max= Dr+ 2 H + 6 mm for type A tyres; Do,m
33、ax= Dr+ 2 H + 10 mm for type D tyres.This includes manufacturing tolerances and growth due to service.4.2.2.3 Minimum overall width, SminThe minimum overall width, Smin, is equal to the design tyre section width, S, plus a value, as shown in Table 2.Table 2 Minimum overall widthDimensions in millime
34、tresNominal section widthSNMinimum overall widthSmin28 S - 228 S - 34.2.3 ValuesTable 3 shows the dimensions for measuring rim width, design section width, and design section height according to 4.2.1 for nominal section widths to be used.Table 3 “Wired edge” tyres mounted on crotchet type rims Desi
35、gn tyre dimensionsDimensions in millimetresNominal section widthSNMeasuring rim width aRmDesign tyreSection widthSSection heightH16 13C 16 2018 13C 18 2220 13C 20 24aFor dimensions of measuring rims, see ISO 5775-2.6 ISO 2014 All rights reservedBS ISO 5775-1:2014ISO 5775-1:2014(E)Nominal section wid
36、thSNMeasuring rim width aRmDesign tyreSection widthSSection heightH23 15C 23 2725 15C 25 2928 17C 28 33,530 17C 30 35,532 17C 32 37,535 19C 35 40,537 19C 37 42,540 19C 40 45,542 19C 42 47,544 19C 44 49,547 19C 47 52,550 19C 50 55,552 19C 52 57,554 19C 54 59,557 19C 57 62,560 21C 60 65,562 21C 62 67,
37、5aFor dimensions of measuring rims, see ISO 5775-2.Table 4 “Wired edge” tyres mounted on straight side and crotchet type rims Recommended rimsDimensions in millimetresNominal section widthSNRecommended rims aStraight side rims bCrotchet type rims c16 13C18 13C20 13C23 16 13C; 15C25 16; 18 13C; 15C;
38、17C28 16; 18; 20 15C; 17C; 19C32 16; 18; 20 15C; 17C; 19C3518; 20; 2217C; 19C; 21C37 17C; 19C; 21C; 23CaCrotchet type rims shall be used when tyre inflation pressures over 500 kPa are recommended.When inflation pressure over 500 kPa is recommended, an appropriate rim base protective flap must be use
39、d when spoke ends are apparent.bStraight side rims are to be used only for non-foldable tyres.cCrotchet type rims can be used with rigid and foldable tyres.dIn case of tubeless application with a tubeless tyre, a special airtight tape shall be used with crotchet type rim, or a special tubeless rim s
40、hall be fitted to the bicycle.Table 3 (continued) ISO 2014 All rights reserved 7BS ISO 5775-1:2014ISO 5775-1:2014(E)Nominal section widthSNRecommended rims aStraight side rims bCrotchet type rims c40 20; 22; 24 17C; 19C; 21C; 23C42 17C; 19C; 21C; 23C; 25C4420; 22; 24; 27 17C; 19C; 21C; 23C; 25C4750
41、22; 24; 27; 30,5 17C; 19C; 21C; 23C; 25C; 27C52 24; 27; 30,5 17C; 19C; 21C; 23C; 25C; 27C; 29C5427; 30,5 17C; 19C; 21C; 23C; 25C; 27C; 29C576062aCrotchet type rims shall be used when tyre inflation pressures over 500 kPa are recommended.When inflation pressure over 500 kPa is recommended, an appropr
42、iate rim base protective flap must be used when spoke ends are apparent.bStraight side rims are to be used only for non-foldable tyres.cCrotchet type rims can be used with rigid and foldable tyres.dIn case of tubeless application with a tubeless tyre, a special airtight tape shall be used with crotc
43、het type rim, or a special tubeless rim shall be fitted to the bicycle.Tables 5 to 7 show the dimensions for the measuring rim width, measuring overall diameter, design section width, design overall diameter, and maximum overall width in service for sizes of interest.Table 5 “Wired edge” sizes for s
44、ection width for SN 28Tyre size des-ignationMeasuring rim width code aTyre dimensions (mm)Design Maximum in serviceSection width Overall diameter Overall width Overall diameterMin Design Min Design Type A Type D Type A Type D18622 13C 16 18 660 666 19 6722057113C 18 20613 61921 62520622 664 670 6762
45、357115C 21 23619 62524 63123622 670 676 68223630 678 684 6902554015C 23 25587 59326 59925622 674 680 68625630 682 688 694aFor dimensions of measuring rims, see ISO 5775-2.Table 4 (continued)8 ISO 2014 All rights reservedBS ISO 5775-1:2014ISO 5775-1:2014(E)Table 6 “Wired edge” sizes for section width
46、 for SN 28Min DesignMin Design Type AType DType AType D28-62217C 26 28 683689 30 36 69569930-62 7C 28 30 687693 32 38 69970332-622 29 32 691697 40 70370732-630 29 32 699705 40 71171535-406 32 35 481487 43 49349735-622 32 35 697703 43 70971337-3053437384 39039637-38737466 47247837-406 34 37 485491 45
47、 49750137-4383437517 52352937-489 34 37 568574 45 58058437-540 34 37 619625 45 63163537-584 34 37 663669 45 67567937-590 34 37 669675 45 68168537-622 34 37 701707 45 71371737-635 34 37 714720 45 72673040-590 37 40 675681 48 68769140-622 37 40 707713 48 71972340-635 37 40 720726 48 73273642-59019C39
48、42 679685 50 69169642-62219C39 42 711717 50 72372744-62219C41 44 7157214752 72773147-30519C44 47 404410 416 47-35519C44 47 45 60 66 47-40619C44 47 505511 55 51752147-45719C44 47 556562 55 56857247-50719C44 47 606612 55 61862247-57119C44 47 670676 55 68268647-62219C44 47 721727 55 73373750-40619C47 5
49、0 511517 53 58 52352750-40719C47 50 612618 53 58 62462850-62219C47 50 727733 53 58 73974354-40619C51 54 519525 57 62 53153557-20319C54 57 322328 60 “334 “57-40619C54 57 525531 60 62 53754162-20321C58 61 332338 64 “344 “Tyre size designationMeasuring rim width code aTyre dimensions (mm)Design Maximum in serviceSection widthOverall diameter Overall widthOverall diameter17C3419 7a For dimensions of measuring rims, see ISO 5775-2.455004C9134C91 ISO 2014 All rights reserved 9BS ISO
