prEN ISO 4210-6

Cycles - Safety requirements for bicycles - Part 6: Frame and fork test methods (ISO/FDIS 4210-6:2022)

Fahrräder - Sicherheitstechnische Anforderungen an Fahrräder - Teil 6: Prüfverfahren für Rahmen und Gabel (ISO/FDIS 4210-6:2022)

Der vorliegende Teil von ISO 4210 legt die Prüfverfahren für Rahmen und Gabeln nach ISO 4210 2 fest.

Cycles - Exigences de sécurité pour les bicyclettes - Partie 6: Méthodes d'essai du cadre et de la fourche (ISO/FDIS 4210-6:2022)

Kolesa - Varnostne zahteve za kolesa - 6. del: Preskusne metode za okvirje in vilice koles (ISO/DIS 4210-6:2021)

General Information

• Status: Not Published
• ICS: 43.150 - Cycles
• Technical Committee: CEN/TC 333 - Cycles
• Current Stage: 4599 - Dispatch of FV draft to CMC - Finalization for Vote
• Due Date: 20-Apr-2021
• Ref Project: oSIST prEN ISO 4210-6:2022 - Cycles - Safety requirements for bicycles - Part 6: Frame and fork test methods (ISO/DIS 4210-6:2021)

RELATIONS

• Revised: EN ISO 4210-6:2015 - Cycles - Safety requirements for bicycles - Part 6: Frame and fork test methods (ISO 4210-6:2015)
• Effective Date: 27-Mar-2019

Standards Content (sample)

SLOVENSKI STANDARD
oSIST prEN ISO 4210-6:2022
01-januar-2022
Kolesa - Varnostne zahteve za kolesa - 6. del: Preskusne metode za okvirje in
vilice koles (ISO/DIS 4210-6:2021)

Cycles - Safety requirements for bicycles - Part 6: Frame and fork test methods (ISO/DIS

4210-6:2021)

Fahrräder - Sicherheitstechnische Anforderungen an Fahrräder - Teil 6: Prüfverfahren

für Rahmen und Gabel (ISO/DIS 4210-6:2021)

Cycles - Exigences de sécurité des bicyclettes - Partie 6 : Méthodes d'essai du cadre et

de la fourche (ISO/DIS 4210-6:2021)
Ta slovenski standard je istoveten z: prEN ISO 4210-6
ICS:
43.150 Kolesa Cycles
oSIST prEN ISO 4210-6:2022 en,fr,de

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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oSIST prEN ISO 4210-6:2022
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oSIST prEN ISO 4210-6:2022
DRAFT INTERNATIONAL STANDARD
ISO/DIS 4210-6
ISO/TC 149/SC 1 Secretariat: JISC
Voting begins on: Voting terminates on:
2021-11-05 2022-01-28
Cycles — Safety requirements for bicycles —
Part 6:
Frame and fork test methods
Cycles — Exigences de sécurité des bicyclettes —
Partie 6: Méthodes d'essai du cadre et de la fourche
ICS: 43.150
THIS DOCUMENT IS A DRAFT CIRCULATED
This document is circulated as received from the committee secretariat.
FOR COMMENT AND APPROVAL. IT IS
THEREFORE SUBJECT TO CHANGE AND MAY
NOT BE REFERRED TO AS AN INTERNATIONAL
STANDARD UNTIL PUBLISHED AS SUCH.
IN ADDITION TO THEIR EVALUATION AS
ISO/CEN PARALLEL PROCESSING
BEING ACCEPTABLE FOR INDUSTRIAL,
TECHNOLOGICAL, COMMERCIAL AND
USER PURPOSES, DRAFT INTERNATIONAL
STANDARDS MAY ON OCCASION HAVE TO
BE CONSIDERED IN THE LIGHT OF THEIR
POTENTIAL TO BECOME STANDARDS TO
WHICH REFERENCE MAY BE MADE IN
Reference number
NATIONAL REGULATIONS.
ISO/DIS 4210-6:2021(E)
RECIPIENTS OF THIS DRAFT ARE INVITED
TO SUBMIT, WITH THEIR COMMENTS,
NOTIFICATION OF ANY RELEVANT PATENT
RIGHTS OF WHICH THEY ARE AWARE AND TO
PROVIDE SUPPORTING DOCUMENTATION. ISO 2021
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oSIST prEN ISO 4210-6:2022
ISO/DIS 4210-6:2021(E)
ISO/DIS 4210-6:2021(E)
Contents

This template allows you to work with default MS Word functions and styles. You can use these if you want

to maintain the Table of Contents automatically and apply auto-numbering.
To update the Table of Contents please select it and press "F9".

Foreword ................................................................................................................................................................. v

Introduction .......................................................................................................................................................... vi

1 Scope ................................................................................................................................................................. 1

2 Normative references ................................................................................................................................. 1

3 Terms and definitions ................................................................................................................................ 1

4 Frame test methods .................................................................................................................................... 1

4.1 Frame — Impact test (falling mass) ...................................................................................................... 1

4.1.1 General ...................................................................................................................................................... 1

4.1.2 Test method ............................................................................................................................................. 1

4.2 Frame and front fork assembly — Impact test (falling frame) .................................................... 4

4.2.1 General ...................................................................................................................................................... 4

4.2.2 Test method ............................................................................................................................................. 4

4.3 Frame — Fatigue test with pedalling forces ....................................................................................... 6

4.3.1 General ...................................................................................................................................................... 6

4.3.2 Test method ............................................................................................................................................. 7

4.4 Frame — Fatigue test with horizontal forces ..................................................................................... 8

4.4.1 General ...................................................................................................................................................... 8

4.4.2 Test method ............................................................................................................................................. 9

4.5 Frame — Fatigue test with a vertical force ......................................................................................... 9

4.5.1 General ...................................................................................................................................................... 9

4.5.2 Test method .......................................................................................................................................... 10

4.6 Rear brake mount tests .......................................................................................................................... 11

4.6.1 General ................................................................................................................................................... 11

4.6.2 Static rear brake torque test .......................................................................................................... 11

4.6.3 Rear brake mount fatigue test ....................................................................................................... 12

5 Fork test methods ..................................................................................................................................... 14

5.1 Suspension forks — Tyre-clearance test .......................................................................................... 14

5.2 Front fork — Tensile test ....................................................................................................................... 14

5.2.1 Test method — Suspension fork ................................................................................................... 14

5.2.2 Test method — Rigid, non-welded fork ...................................................................................... 14

5.3 Front fork — Static bending test ......................................................................................................... 14

5.4 Front fork — Rearward impact test ................................................................................................... 15

5.4.1 Test method 1 ...................................................................................................................................... 15

5.4.2 Test method 2 (only for forks made entirely of metal) ........................................................ 17

5.4.3 Test method 3 ...................................................................................................................................... 17

5.5 Front fork — Bending fatigue test and rearward impact test................................................... 18

COPYRIGHT PROTECTED DOCUMENT

5.6 Forks intended for use with hub or disc brakes ............................................................................ 19

© ISO 2021

5.6.1 General ................................................................................................................................................... 19

All rights reserved. Unless otherwise specified, or required in the context of its implementation, no part of this publication may

5.6.2 Fork for hub/disc brake — Static brake-torque test ............................................................. 19

be reproduced or utilized otherwise in any form or by any means, electronic or mechanical, including photocopying, or posting

5.6.3 Fork for hub/disc brake — Brake mount fatigue test ........................................................... 20

on the internet or an intranet, without prior written permission. Permission can be requested from either ISO at the address

5.6.4 Fork made of composite materials designed for disc brakes ............................................. 21

below or ISO’s member body in the country of the requester.
5.6.5 Fork for hub/disc brake — Brake mount fatigue test for composite rigid and
ISO copyright office
CP 401 • Ch. de Blandonnet 8

suspension forks. ................................................................................................................................ 23

CH-1214 Vernier, Geneva

5.7 Fork steerer tube and stem assembly — Fatigue Test ................................................................ 23

Phone: [phone]
Fax: [phone]
Email: [e-mail]
Website: www.iso.org
© ISO 2021 – All rights reserved iii
Published in Switzerland
ii © ISO 2021 – All rights reserved
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oSIST prEN ISO 4210-6:2022
ISO/DIS 4210-6:2021(E)
Contents

This template allows you to work with default MS Word functions and styles. You can use these if you want

to maintain the Table of Contents automatically and apply auto-numbering.
To update the Table of Contents please select it and press "F9".

Foreword ................................................................................................................................................................. v

Introduction ..........................................................................................................................................................vi

1 Scope ................................................................................................................................................................. 1

2 Normative references ................................................................................................................................. 1

3 Terms and definitions ................................................................................................................................ 1

4 Frame test methods .................................................................................................................................... 1

4.1 Frame — Impact test (falling mass) ...................................................................................................... 1

4.1.1 General ...................................................................................................................................................... 1

4.1.2 Test method ............................................................................................................................................. 2

4.2 Frame and front fork assembly — Impact test (falling frame) .................................................... 4

4.2.1 General ...................................................................................................................................................... 4

4.2.2 Test method ............................................................................................................................................. 4

4.3 Frame — Fatigue test with pedalling forces ....................................................................................... 6

4.3.1 General ...................................................................................................................................................... 6

4.3.2 Test method ............................................................................................................................................. 7

4.4 Frame — Fatigue test with horizontal forces ..................................................................................... 8

4.4.1 General ...................................................................................................................................................... 8

4.4.2 Test method ............................................................................................................................................. 9

4.5 Frame — Fatigue test with a vertical force ......................................................................................... 9

4.5.1 General ...................................................................................................................................................... 9

4.5.2 Test method .......................................................................................................................................... 10

4.6 Rear brake mount tests .......................................................................................................................... 11

4.6.1 General ................................................................................................................................................... 11

4.6.2 Static rear brake torque test .......................................................................................................... 11

4.6.3 Rear brake mount fatigue test ....................................................................................................... 12

5 Fork test methods ..................................................................................................................................... 14

5.1 Suspension forks — Tyre-clearance test .......................................................................................... 14

5.2 Front fork — Tensile test ....................................................................................................................... 14

5.2.1 Test method — Suspension fork ................................................................................................... 14

5.2.2 Test method — Rigid, non-welded fork ...................................................................................... 14

5.3 Front fork — Static bending test ......................................................................................................... 14

5.4 Front fork — Rearward impact test ................................................................................................... 15

5.4.1 Test method 1 ...................................................................................................................................... 15

5.4.2 Test method 2 (only for forks made entirely of metal) ........................................................ 17

5.4.3 Test method 3 ...................................................................................................................................... 17

5.5 Front fork — Bending fatigue test and rearward impact test ................................................... 18

5.6 Forks intended for use with hub or disc brakes ............................................................................ 19

5.6.1 General ................................................................................................................................................... 19

5.6.2 Fork for hub/disc brake — Static brake-torque test ............................................................. 19

5.6.3 Fork for hub/disc brake — Brake mount fatigue test ........................................................... 20

5.6.4 Fork made of composite materials designed for disc brakes ............................................. 21

5.6.5 Fork for hub/disc brake — Brake mount fatigue test for composite rigid and

suspension forks. ................................................................................................................................ 23

5.7 Fork steerer tube and stem assembly — Fatigue Test ................................................................ 23

© ISO 2021 – All rights reserved iii
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oSIST prEN ISO 4210-6:2022
ISO/DIS 4210-6:2021(E)

5.7.1 General ....................................................................................................................................................23

5.7.2 Test method ..........................................................................................................................................23

Annex A (normative) Dummy fork characteristics ..............................................................................25

Annex B (normative) Fork mounting fixture .........................................................................................27

Annex C (informative) Suspension frames — Tyre-clearance test .................................................28

C.1 Suspension frames — Tyre-clearance test .......................................................................................28

C.1.1 Requirements .......................................................................................................................................28

C.1.2 Test method ..........................................................................................................................................28

iv © ISO 2021 – All rights reserved
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oSIST prEN ISO 4210-6:2022
ISO/DIS 4210-6:2021(E)
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 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 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

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 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 document is information given for the convenience of users and does not

constitute an endorsement.

For an explanation of the voluntary nature of standards, the meaning of ISO specific terms and

expressions related to conformity assessment, as well as information about ISO's adherence to the World

Trade Organization (WTO) principles in the Technical Barriers to Trade (TBT), see

www.iso.org/iso/foreword.html.

This document was prepared by Technical Committee ISO/TC 149, Cycles, Subcommittee SC 1, Cycles and

major sub-assemblies.

This third edition cancels and replaces the second edition (ISO 4210-6:2015), which has been technically

revised.
The main changes compared to the previous edition are as follows:
— xxx xxxxxxx xxx xxxx
A list of all parts in the ISO 4210 series can be found on the ISO website.

Any feedback or questions on this document should be directed to the user’s national standards body. A

complete listing of these bodies can be found at www.iso.org/members.html.
© ISO 2021 – All rights reserved v
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oSIST prEN ISO 4210-6:2022
ISO/DIS 4210-6:2021(E)
Introduction

This International Standard has been developed in response to demand throughout the world, and the

aim has been to ensure that bicycles manufactured in compliance with this International Standard will

be as safe as is practically possible. The tests have been designed to ensure the strength and durability of

individual parts as well as of the bicycle as a whole, demanding high quality throughout and consideration

of safety aspects from the design stage onwards.

The scope has been limited to safety considerations, and has specifically avoided standardization of

components.
If the bicycle is to be used on public roads, national regulations apply.
vi © ISO 2021 – All rights reserved
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oSIST prEN ISO 4210-6:2022
DRAFT INTERNATIONAL STANDARD ISO/DIS 4210-6:2021(E)
1 Cycles — Safety requirements for bicycles — Part 6: Frame and
2 fork test methods
3 1 Scope

4 This part of ISO 4210 specifies the frame and fork test methods for ISO 4210-2.

5 2 Normative references

6 The following documents are referred to in the text in such a way that some or all of their content

7 constitutes requirements of this document. For dated references, only the edition cited applies. For

8 undated references, the latest edition of the referenced document (including any amendments) applies.

9 ISO 4210-1, Cycles — Safety requirements for bicycles — Part 1: Terms and definitions

10 ISO 4210-2, Cycles — Safety requirements for bicycles — Part 2: Requirements for city and trekking, young

11 adult, mountain and racing bicycles

12 ISO 4210-3, Cycles — Safety requirements for bicycles — Part 3: Common test methods

13 ISO 4210-5, Cycles — Safety requirements for bicycles — Part 5: Steering test methods

14 3 Terms and definitions

15 For the purposes of this document, the terms and definitions given in ISO 4210-1 apply.

16 ISO and IEC maintain terminological databases for use in standardization at the following addresses:

17 — ISO Online browsing platform: available at https://www.iso.org/obp
18 — IEC Electropedia: available at http://www.electropedia.org/
19 4 Frame test methods
20 4.1 Frame — Impact test (falling mass)
21 4.1.1 General

22 Manufacturers of frames are permitted to conduct the test with a dummy fork (see Annex A) fitted in

23 place of a front fork.

24 Where a frame is convertible for male and female riders by the removal of a bar, test it with the bar

25 removed.

26 Where a suspension fork is fitted, test the assembly with the fork extended to its unloaded free length.

27 Where a rear suspension system is incorporated in the frame, secure the suspension in a position

28 equivalent to that which would occur with an 80 kg rider seated on the bicycle. For young adult bicycles,

29 secure the suspension in a position equivalent to that which would occur with a 40 kg rider seated on the

30 bicycle; if the type of suspension system does not permit it to be locked, then replace the spring/damper

31 unit by a solid link of the appropriate size and with end fittings similar to those of the spring/damper

32 unit.
© ISO 2021 – All rights reserved 1
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oSIST prEN ISO 4210-6:2022
ISO/DIS 4210-6:2021(E)
33 4.1.2 Test method

34 Assemble a roller of mass less than or equal to 1 kg and with dimensions conforming to those shown in

35 Figure 1 in the fork. The hardness of roller shall be not less than 60 HRC at impact surface. If a dummy

36 fork is used in place of a fork, the bar shall have a rounded end equivalent in shape to the roller. Hold the

37 frame-fork or frame-bar assembly vertically with clamping to a rigid fixture by the rear-axle attachment

38 points as shown in Figure 1.

39 Rest a striker of mass 22,5 kg on the roller in the fork dropouts or on the rounded end of the dummy fork

40 and measure the wheelbase. Raise the striker to a height of h above the low-mass roller and release it to

41 strike the roller or the steel bar at a point in line with the wheel centres and against the direction of the

42 fork rake or rake of the bar. The drop heights are given in Table 1. The striker will bounce and this is

43 normal. When the striker has come to rest on the roller or dummy fork, measure the wheelbase again.

44 If the fork fails, the frame shall be tested with a dummy fork.
45 NOTE See ISO 4210-3, Annex B.
46 Drop heights
47 Dimensions in millimetres
City and
Young adult Mountain
Bicycle type trekking Racing bicycles
bicycles bicycles
bicycles
Drop height, h
180 180 360 212
2 © ISO 2021 – All rights reserved
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oSIST prEN ISO 4210-6:2022
ISO/DIS 4210-6:2021(E)
48 Dimensions in millimetres
50 Key
h drop height
1 wheelbase
2 permanent deformation
3 22,5 kg striker
4 low-mass roller (1 kg max.)
5 rigid mounting for rear-axle attachment point
6 direction of rearward impact
51 Figure 1 — Frame and front fork assembly — Impact test (falling mass)
© ISO 2021 – All rights reserved 3
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oSIST prEN ISO 4210-6:2022
ISO/DIS 4210-6:2021(E)
52 4.2 Frame and front fork assembly — Impact test (falling frame)
53 4.2.1 General

54 Manufacturers of complete bicycles shall conduct the test with the frame fitted with the appropriate front

55 fork.

56 For manufacturers of frames, where the fork intended for the frame is not available, the test can be

57 conducted with the frame fitted with a fork which meets the requirements of the fork impact test as

58 described in ISO 4210-2, 4.9.5.

59 Where a frame is convertible for male and female riders by the removal of a bar, test it with the bar

60 removed.

61 Where a suspension fork is fitted, it shall be at its unloaded length prior to the impact. If the

62 spring/damper unit can be locked, it shall be locked in its unloaded length position. If the spring/damper

63 cannot be locked, use one of the two following alternative procedures:
64 — secure the fork at its extended length by an external locking method, or

65 — replace the fork by a rigid fork which is known to meet the requirements of the impact test described

66 in ISO 4210-2, 4.9.5 and of a length which is consistent with an 80 kg (in case of young adult bicycles,

67 apply 40 kg) rider seated in a normal riding position on the bicycle when it is equipped with the

68 suspension fork.

69 Where a rear suspension system is incorporated in the frame, secure the spring/damper unit in a position

70 equivalent to that which would occur with an 80 kg (in case of young adult bicycles, apply 40 kg) rider

71 seated on the bicycle; if the type of suspension system does not permit it to be locked, then replace the

72 spring/damper unit by a solid link of the appropriate size and with end fittings similar to those of the

73 spring/damper unit.
74 4.2.2 Test method

75 Conduct the test on the assembly used for the test in ISO 4210-2, 4.8.2 or, in the case of a frame

76 manufacturer who does not make forks, with the same frame with a suitable fork fitted (see 4.2.1).

77 As shown in Figure 2, mount the frame-fork assembly at its rear axle attachment points so that it is free

78 to rotate about the rear axle in a vertical plane. Support the front fork on a flat steel anvil so that the frame

79 is in its normal position of use. Securely fix mass M to the seat-post as shown in Figure 2 with the centre

80 of gravity at distance D (= 75 mm) along the seat-post axis from the insertion point, and fix masses of M

81 and M (Table 2) to the top of the steering head and the bottom bracket, respectively, as shown in

82 Figure 2.

83 Measure the wheelbase with the three masses in place. Rotate the assembly about the rear axle until the

84 distance between the low-mass roller and the anvil is h , then allow the assembly to fall freely to impact

85 on the anvil.

86 Repeat the test and then measure the wheelbase again with the three masses in place and the roller

87 resting on the anvil.
4 © ISO 2021 – All rights reserved
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oSIST prEN ISO 4210-6:2022
ISO/DIS 4210-6:2021(E)

88 Drop heights and distribution of masses at seat post, steering head, and bottom bracket

City and
Young adult Mountain
Bicycle type trekking Racing bicycles
bicycles bicycles
bicycles
Mass 1
Seat-post, M
50 40 30 30
Mass 2
Steering head, M
10 10 10 10
Mass 3
Bottom bracket, M
30 20 50 50
Drop height, h
200 200 300 200
© ISO 2021 – All rights reserved 5
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oSIST prEN ISO 4210-6:2022
ISO/DIS 4210-6:2021(E)
89 Dimensions in millimetres
91 Key
1 wheelbase
2 permanent deformation
mass 1 (M )
4 mass 2 (M )
5 mass 3 (M )
6 rigid mounting for rear-axle attachment point
7 steel anvil
D distance to the centre of gravity (75 mm)
h drop height
92 Figure 2 — Frame and front fork assembly — Impact test (falling frame)
93 4.3 Frame — Fatigue test with pedalling forces
94 4.3.1 General
95 All types of frame shall be subjected to this test.

96 In tests on suspension frames with pivoted joints, adjust the spring, air pressure, or damper to

...