1、BSI Standards PublicationBS ISO 5775-2:2015Bicycle tyres and rimsPart 2: RimsBS ISO 5775-2:2015 BRITISH STANDARDNational forewordThis British Standard is the UK implementation of ISO 5775-2:2015. Itsupersedes BS 6102-6:1997 which is withdrawn.The UK participation in its preparation was entrusted to
2、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 British Standards Instituti
3、on 2015. Published by BSI StandardsLimited 2015ISBN 978 0 580 71479 5ICS 43.150Compliance with a British Standard cannot confer immunity fromlegal obligations.This British Standard was published under the authority of theStandards Policy and Strategy Committee on 31 December 2015.Amendments issued s
4、ince publicationDate T e x t a f f e c t e dBS ISO 5775-2:2015 ISO 2015Bicycle tyres and rims Part 2: RimsPneumatiques et jantes pour cycles Partie 2: JantesINTERNATIONAL STANDARDISO5775-2Third edition2015-12-01Reference numberISO 5775-2:2015(E)BS ISO 5775-2:2015ISO 5775-2:2015(E)ii ISO 2015 All rig
5、hts reservedCOPYRIGHT PROTECTED DOCUMENT ISO 2015, Published in SwitzerlandAll rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized otherwise in any form or by any means, electronic or mechanical, including photocopying, or posting on the internet or
6、 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 officeCh. de Blandonnet 8 CP 401CH-1214 Vernier, Geneva, SwitzerlandTel. +41 22 749 01 11Fax +41 22 749 09 47copyrightiso
7、.orgwww.iso.orgBS ISO 5775-2:2015ISO 5775-2:2015(E)Foreword iv1 Scope . 12 Symbols and abbreviated terms . 13 General requirements . 13.1 Rim contour . 13.2 Rim valve hole 23.3 Specific requirements . 24 Straight side rims . 24.1 Rim contour . 24.2 Rim diameter 24.3 Designation and marking . 25 Hook
8、ed bead rims . 65.1 Rim contours. 65.2 Rim diameters and circumferences 65.3 Designation and marking . 66 Crotchet type rims. 76.1 Rim contours. 76.2 Rim diameters . 76.3 Designation and marking . 7Annex A (informative) Methods for measuring and gauging bicycle rim dimensions .10 ISO 2015 All rights
9、 reserved iiiContents PageBS ISO 5775-2:2015ISO 5775-2:2015(E)ForewordISO (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 commi
10、ttees. 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, governmental and non-governmental, in liaison with ISO, also take part in the work. ISO collaborates closely with the I
11、nternational Electrotechnical Commission (IEC) on all matters of electrotechnical 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
12、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).Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. ISO
13、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 Introduction and/or on the ISO list of patent declarations received (see www.iso.org/patents).Any trade name used in this documen
14、t 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 conformity assessment, as well as information about ISOs adherence to the WTO principles in the Technical Barriers to Trade (T
15、BT) see the following URL: Foreword - Supplementary informationThe committee responsible for this document is ISO/TC 31, Tyres, rims and valves, Subcommittee SC 10, Cycle, moped, motorcycle tyres and rims.This third edition cancels and replaces the second edition (ISO 5775-2:1996), which has been te
16、chnically revised.It also incorporates the Amendment, ISO 5775-2:1996/Amd 1:2001.ISO 5775 consists of the following parts, under the general title Bicycle tyres and rims: Part 1: Tyre designations and dimensions Part 2: RimsAnnex A of this part of ISO 5775 is for information only.iv ISO 2015 All rig
17、hts reservedBS ISO 5775-2:2015INTERNATIONAL STANDARD ISO 5775-2:2015(E)Bicycle tyres and rims Part 2: Rims1 ScopeThis part of ISO 5775 specifies rim dimensions for bicycle tyres: it gives only those rim contour dimensions necessary for tyre mounting and to fit the tyre on the rim.ISO 5775-1 covers d
18、esignations and dimensions for tyres.ISO 5775-2 covers straight side (SS) rims, hooked bead type (HB) rims and crotchet type (C) rims.2 Symbols and abbreviated termsThe following symbols are used in this part of ISO 5775:A Rim widthD Specified rim diameterD1Measured rim diameterD2External diameterDm
19、Measuring mandrel diameterG Flange heightH, H1Unobstructed minimum depth above rim base with rim tape fitted to permit tyre fitmentL Theoretical tape lengthL1Well width above rim tapeP Bead seat widthR1, R2Flange radiusR4Well top radiusW Measuring tape width3 General requirements3.1 Rim contourThe r
20、im shall have a smooth contour, free of sharp edges, on the side of the tyre. ISO 2015 All rights reserved 1BS ISO 5775-2:2015ISO 5775-2:2015(E)3.2 Rim valve holeThe rim valve hole shall be centred on the bottom of the rim well. On the tyre side, the edges have to be rounded or chamfered. On the hub
21、 side, the edges shall be free from burrs which could damage the valve.3.3 Specific requirementsDesignation and dimensions for straight side rims, hooked bead type rims and crotchet type rims are given in Clauses 4, 5 and 6 respectively.Width and thickness of rim base protection shall be chosen in s
22、uch a way as to guarantee the complete covering of the spoke heads and spoke holes during use, as well as a stable lateral fit, and to permit satisfactory fitting of the tyre and the tube.4 Straight side rims4.1 Rim contourDimensions and tolerances of straight side (SS) rims shall be given in Figure
23、 1 and Table 1Straight side rims are to be used only with non-foldable tyres (rigid bead tyres).4.2 Rim diameterThe nominal rim diameter code, specified rim diameters and measuring rim diameters for straight side (SS) rims has to be given in Figure 1 and Table 2.4.3 Designation and markingA straight
24、 side (SS) rim shall be designated by its nominal rim diameter code and its nominal width code, optionally preceded by “SS” for straight side.EXAMPLE SS 400 202 ISO 2015 All rights reservedBS ISO 5775-2:2015ISO 5775-2:2015(E)Dimensions in millimetresKeya1810(Rim 18 only).bMeasuring rim diameter.cVal
25、ve holes 6,2+0,3/+0; 8,3+0,3/+0.dSpecified rim diameter.eAllowed 5 to 15 (5 to 25 in case of rolled rims with nominal rim diameter 400 and smaller).Figure 1 Straight side rims ISO 2015 All rights reserved 3BS ISO 5775-2:2015ISO 5775-2:2015(E)Table 1 Dimensions of straight side rimsDimensions in mill
26、imetresWidth codeA1G0,5H1a,bL1bminPminR1minR4minmin max16 16 5,5 1,8 6 9 1,5 1 1,518c18 6,5 1,8 6 10 1,8 1,5 1,520 20 6,5 2 6,5 11 2 1,8 1,522 22 6,5 3 7, 5 11 2,2 1,8 224 24 7 3 7, 5 11 3 2 2,527 27 7, 5 3,5 8 14 3,5 2,5 2,530,5 30,5 8 3,5 8 14 3,5 2,5 2,5aIt is recommended that the contour of rims
27、 having a specified diameter below 400 mm should have well depth H11 mm deeper.bThe dimension H1, in conjunction with dimension L1, defines a minimum unobstructed space above the rim base and the nipple heads with the rim base protective flap fitted to permit satisfactory tyre fitment. The dimension
28、 H1, is to be varied as the discretion of rim manufacturers to achieve the above objective.cPreviously known as rim with code 17.Table 2 Specified and measuring ring rim diameters for straight side rims and crotchet type rimsDimensions in millimetresNominal diameter code Specified rim diameter D Mea
29、suring rim diameter D1 0,5a194 194,2 193,85203 203,2 202,85222 222,2 221,85239 239,4 239,05248 247,6 247, 25251 250,8 250,45279 279,2 278,85288 287, 8 287,45298 298,4 298,05305 304,7 304,35317 317,0 316,65330 329,8 329,45337 336,6 336,25340 339,6 339,25349 349,2 348,85355 355,0 354,65357 357,1 356,7
30、5369 368,6 368,25381 380,9 380,55387 386,6 386,25a The tolerance on the measured bead seat circumference (p measuring rim diameter) is 1,5mm.4 ISO 2015 All rights reservedBS ISO 5775-2:2015ISO 5775-2:2015(E)Nominal diameter code Specified rim diameter D Measuring rim diameter D1 0,5a390 389,6 389,25
31、400 400,1 399,75406 405,6 405,25419 418,6 418,25428 428,1 427,75432 431,6 431,25438 437,9 437, 55440 439,9 439,55451 450,8 450,45457 457,0 456,65484 484,0 483,65489 488,6 488,25490 490,2 489,85498 497, 5 497,15501 501,3 500,95507 507, 3 506,95520 520,2 519,85531 530,6 530,25534 533,5 533,15540 539,6
32、 539,25541 540,8 540,45547 546,5 546,15559 558,8 558,45565 564,9 564,55571 571,0 570,65584 583,9 583,55590 590,2 589,85597 597, 2 596,85609 609,2 608,85622 622,3 621,95630 629,7 629,35635 634,7 634,35642 641,7 641,35a The tolerance on the measured bead seat circumference (p measuring rim diameter) i
33、s 1,5mm.The mandrel diameter (Dm+0050,) related to the First Method is equal to the measuring rim diameter D1. The theoretical tape length, including the maximum tolerance on the bead set circumference, can be computed from L = (D1+ 0,3) + 2,0 and is related to the flat tape at 20 C (See A.4).Table
34、2 (continued) ISO 2015 All rights reserved 5BS ISO 5775-2:2015ISO 5775-2:2015(E)5 Hooked bead rims5.1 Rim contoursDimensions and tolerances of hooked bead (HB) rims shall be as given in Figure 2 and Table 3.5.2 Rim diameters and circumferencesThe nominal rim diameter code, specified rim diameters an
35、d measuring circumferences for hooked bead (HB) rims shall be as given in Figure 2 and Table 4.5.3 Designation and markingA hooked bead (HB) rim shall be designated by its nominal rim diameter code and its nominal width code, preceded by “HB” for hooked bead.EXAMPLE HB 422 25Dimensions in millimetre
36、sHR2A 20,8 minD2bKeyaValve hole.bOptional opening not to exceed 1 mm.Figure 2 Hooked bead rimsTable 3 Dimensions of hooked bead rimsDimensions in millimetresNominal rim width A1HminR20,5R7min20 20 13 2 3025 25 14 2 5027 27 15 2 706 ISO 2015 All rights reservedBS ISO 5775-2:2015ISO 5775-2:2015(E)Tabl
37、e 4 Specified rim diameters and circumferences for hooked bead rimsDimensions in millimetresNominal rim diameter code Specified rim diameterDSpecified rim circumference, D2,5HB270 269,9 847,9HB321 320,7 1 007, 5HB372 371,5 1 167,1HB422 422,3 1 326,7HB459 458,8 1 441,4HB473 473,1 1 486,3HB510 509,6 1
38、 601HB524 523,9 1 645,9HB560 560,4 1 760,6HB575 574,7 1 805,5HB611 611,2 1 920,1HB denotes hooked bead rim; the number following HB is the rim code.6 Crotchet type rims6.1 Rim contoursDimensions and tolerances of crotchet type (C) rims shall be as given in Figure 3 and Table 5.Crotchet type rims sha
39、ll be used with rigid and foldable bead tyres.6.2 Rim diametersThe nominal rim diameter code, specified rim diameters and measuring rim diameters for crotchet type (C) rims shall be given in Figure 3 and Table 2.6.3 Designation and markingA crotchet type (C) shall be designated by its nominal rim di
40、ameter code and its nominal width code, followed by “C” for crotchet type.EXAMPLE 622 13C ISO 2015 All rights reserved 7BS ISO 5775-2:2015ISO 5775-2:2015(E)Dimensions in millimetresAR4P L1c0,5 min10dR11D1dDHbG1,5 0,3Ac0,5 min10dR11HbG1,5 0,3D1dDR 0,8 maxR = 2 minaaR = 2 minaaR 0,8 maxKeyaThe interna
41、l surface of the bottom well and the flange edge is to guarantee a smooth non aggressive surface in order not to damage the tyre.bDimension H defines a minimum unobstructed space above the rim base and the nipple heads, with the rim tape fitted to permit satisfaction tyre fitment. Rim manufacturers
42、shall recommend a maximum thickness for the rim tape to be used, taking into account D1and its tolerances. In the absence of any specification from rim manufacturers, the maximum thickness of the rim tape shall not exceed 0,8 mm in the area of the bead seat.cValve holes 6,2+0,3/+0. For rim codes 17C
43、 and above, valve holes 8,3+0,3/+0are permitted.dFor reference purposes only, dimension D1on Table 2 is to be respected.Figure 3 Crotchet side rims8 ISO 2015 All rights reservedBS ISO 5775-2:2015ISO 5775-2:2015(E)Table 5 Dimensions of crotchet type rimsDimensions in millimetresRim con-tourA0,5G0,5H
44、L1minPminR1R4minmin max13C 13 5,5 2,2 5,5 2,5 0,9 0,1 15C 15 5,5 2,2 5,5 9 2,5 0,9 0,1 1,517C 17 6 2,2 6 10 2,5 1,1 0,25 1,519C 19 6 2,2 6 11 3 1,1 0,25 1,521C 21 6 2,2 6 11 3 1,1 0,25 223C 23 6,5 3,5 6,5 11 3 1,1 0,25 2,525C 25 6,5 3,5 6,5 14 3 1,1 0,25 2,527C 27 6,5 3,5 6,5 14 3 1,1 0,25 2,529C 29
45、 6,5 3,5 6,5 14 3 1,1 0,25 2,5 ISO 2015 All rights reserved 9BS ISO 5775-2:2015ISO 5775-2:2015(E)Annex A (informative) Methods for measuring and gauging bicycle rim dimensionsA.1 PurposeAnnex A gives methods for measuring and gauging dimensions of straight side rims, hooked bead type rims and crotch
46、et type rims.A.2 GeneralAll measurements shall be made on rims ready for tyre mounting and placed on flat surfaces. For accurate measurements, gauges and tapes shall always be set perpendicular to the rim flanges on both bead seats.A.3 Main rim dimensions to be measured and gaugedThe main rim dimens
47、ions which are measured and gauged are indicated in Figures A.1, A.2 and A.3.10 ISO 2015 All rights reservedBS ISO 5775-2:2015ISO 5775-2:2015(E)Dimensions in millimetresA18 0 -1R4PDdL110 eGDb 1H1H1,0caR max1R1Keya1810(Rim 18 only).bMeasuring rim diameter.cValve holes 6,2+0,3/+0; 8,3+0,3/+0.dSpecifie
48、d rim diameter.eAllowed 5 to 15 (5 to 25 in case of rolled rims with nominal rim diameter 400 and smaller).Figure A.1 Straight side rimsR2AD2Figure A.2 Hooked bead rims ISO 2015 All rights reserved 11BS ISO 5775-2:2015ISO 5775-2:2015(E)Dimensions in millimetresAR4P L1c0,5 min10dR11D1dDHbG1,5 0,3Ac0,
49、5 min10dR11HbG1,5 0,3D1dDR 0,8 maxR = 2 minaaR = 2 minaaR 0,8 maxKeyaThe internal surface of the bottom well and the flange edge is to guarantee a smooth non aggressive surface in order not to damage the tyre.bDimension H defines a minimum unobstructed space above the rim base and the nipple heads, with the rim tape fitted to permit satisfaction tyre fitment. Rim manufacturers shall recommend a maximum thickness for the rim tape to be used, taking into
