ISO 4210-5:2023
(Main)Cycles — Safety requirements for bicycles — Part 5: Steering test methods
Cycles — Safety requirements for bicycles — Part 5: Steering test methods
This document specifies the steering test methods for ISO 4210‑2.
Cycles — Exigences de sécurité pour les bicyclettes — Partie 5: Méthodes d'essai de la direction
Le présent document spécifie les méthodes d'essai de la direction pour l'ISO 4210-2.
General Information
- Status
- Published
- Publication Date
- 10-Jan-2023
- Technical Committee
- ISO/TC 149/SC 1 - Cycles and major sub-assemblies
- Current Stage
- 6060 - International Standard published
- Start Date
- 11-Jan-2023
- Due Date
- 12-Sep-2022
- Completion Date
- 11-Jan-2023
Relations
- Effective Date
- 09-Feb-2026
- Effective Date
- 09-Feb-2026
- Effective Date
- 12-Feb-2026
- Effective Date
- 23-Apr-2020
Overview
ISO 4210-5:2023 - "Cycles - Safety requirements for bicycles - Part 5: Steering test methods" specifies standardized steering and handlebar test methods that support ISO 4210‑2 requirements for city, trekking, young adult, mountain and racing bicycles. This second edition (2023) updates test procedures used to verify the strength, durability and secure assembly of handlebars, stems, grips, bar ends and related steering components.
Key topics and technical requirements
This part of the ISO 4210 series defines practical steering test methods, including:
Handlebar grips and plugs
- Freezing test: grips/plugs immersed then frozen; 70 N loosening force applied until +5 °C.
- Hot water test: immersion at +60 °C ±2 °C for 1 h; 100 N loosening force maintained 1 min.
Handlebar stem and assembly bending tests
- Stem lateral bending (quill or extension): lateral force F at distance d (see standard). Example forces: 600 N (city/trekking, young adult), 1 000 N (mountain, racing).
- Handlebar + stem lateral bending: force applied 50 mm from free end; forces aligned with ISO tables.
Forward bending (stem)
- Stage 1: apply force at 45°; 1 600 N for all bicycle types; measure permanent deformation per ISO 4210‑2.
- Stage 2: progressively increase to higher forces (e.g., 2 000–2 600 N) or until specified deflection.
Torsional security tests
- Handlebar-to-stem torque: 60–80 N·m depending on bicycle type.
- Stem-to-steerer torque: 50 N·m applied in each rotation direction.
- Bar end torsion: forces specified by bar‑end length (example forces: 300–500 N).
Other tests
- Torsional tests for bar ends and aerodynamic extensions, and fatigue tests for handlebar/stem assemblies (including special procedure for drop handlebars).
All test values and procedures are normative and referenced to ISO 4210‑2 and ISO 4210‑3 for common test methods and definitions.
Practical applications and who uses it
ISO 4210-5:2023 is used by:
- Bicycle manufacturers for design verification and production quality control
- Component suppliers (stems, handlebars, grips, bar ends) for product validation
- Accredited test laboratories performing conformity and safety testing
- Product development and R&D teams to assess durability and rider safety
- Regulatory bodies and procurement specialists specifying safety compliance
Adoption of these steering test methods reduces steering-failure risks, supports conformity with ISO 4210‑2 safety requirements, and helps manufacturers demonstrate product reliability.
Related standards
- ISO 4210-1: Vocabulary (definitions)
- ISO 4210-2: Requirements for city, trekking, young adult, mountain and racing bicycles
- ISO 4210-3: Common test methods
ISO 4210-5:2023 is essential when implementing ISO 4210 bicycle safety testing and for anyone concerned with handlebar and steering component safety, torsional security, bending resistance and fatigue performance.
ISO 4210-5:2023 - Cycles — Safety requirements for bicycles — Part 5: Steering test methods Released:11. 01. 2023
ISO 4210-5:2023 - Cycles — Safety requirements for bicycles — Part 5: Steering test methods Released:8/22/2023
ISO 4210-5:2023 - Cycles — Exigences de sécurité pour les bicyclettes — Partie 5: Méthodes d'essai de la direction Released:8/28/2023
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Frequently Asked Questions
ISO 4210-5:2023 is a standard published by the International Organization for Standardization (ISO). Its full title is "Cycles — Safety requirements for bicycles — Part 5: Steering test methods". This standard covers: This document specifies the steering test methods for ISO 4210‑2.
This document specifies the steering test methods for ISO 4210‑2.
ISO 4210-5:2023 is classified under the following ICS (International Classification for Standards) categories: 43.150 - Cycles. The ICS classification helps identify the subject area and facilitates finding related standards.
ISO 4210-5:2023 has the following relationships with other standards: It is inter standard links to EN ISO 4210-6:2023, EN ISO 4210-2:2023, EN ISO 4210-5:2023, ISO 4210-5:2014. Understanding these relationships helps ensure you are using the most current and applicable version of the standard.
ISO 4210-5:2023 is available in PDF format for immediate download after purchase. The document can be added to your cart and obtained through the secure checkout process. Digital delivery ensures instant access to the complete standard document.
Standards Content (Sample)
INTERNATIONAL ISO
STANDARD 4210-5
Second edition
2023-01
Cycles — Safety requirements for
bicycles —
Part 5:
Steering test methods
Cycles — Exigences de sécurité pour les bicyclettes —
Partie 5: Méthodes d'essai de la direction
Reference number
© ISO 2023
All rights reserved. Unless otherwise specified, or required in the context of its implementation, 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 an intranet, without prior written permission. Permission can be requested from either ISO at the address below
or ISO’s member body in the country of the requester.
ISO copyright office
CP 401 • Ch. de Blandonnet 8
CH-1214 Vernier, Geneva
Phone: +41 22 749 01 11
Email: copyright@iso.org
Website: www.iso.org
Published in Switzerland
ii
Contents Page
Foreword .iv
Introduction .v
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Test methods . 1
4.1 Handlebar grips and plugs . 1
4.1.1 Freezing test . 1
4.1.2 Hot water test . 2
4.2 Handlebar stem — Lateral bending test . 2
4.3 Handlebar and stem assembly — Lateral bending test . 3
4.4 Handlebar stem — Forward bending test . 5
4.4.1 Test method for stage 1 . 5
4.4.2 Test method for stage 2 . 7
4.5 Handlebar to handlebar stem — Torsional security test . 7
4.6 Handlebar stem to fork steerer — Torsional security test . 7
4.7 Bar end to handlebar — Torsional security test . 8
4.8 Aerodynamic extensions to handlebar — Torsional security test . 9
4.9 Handlebar and stem assembly — Fatigue test . 10
4.9.1 Test method except drop handlebar . 10
4.9.2 Test method for drop handlebar .12
iii
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, in collaboration with the European Committee for Standardization (CEN)
Technical Committee CEN/TC 333, Cycles, in accordance with the Agreement on technical cooperation
between ISO and CEN (Vienna Agreement).
This second edition cancels and replaces the first edition (ISO 4210-5:2014), which has been technically
revised.
The main changes are as follows:
— improvement of 4.1.1;
— improvement of 4.3;
— improvement of 4.4;
— increase in test torque for 4.6;
— improvement of 4.9.
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.
iv
Introduction
This document has been developed in response to demand throughout the world, and the aim has been
to ensure that bicycles manufactured in conformity with this document 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 should be used on public roads, national regulations apply.
v
INTERNATIONAL STANDARD ISO 4210-5:2023(E)
Cycles — Safety requirements for bicycles —
Part 5:
Steering test methods
1 Scope
This document specifies the steering test methods for ISO 4210-2.
2 Normative references
The following documents are referred to in the text in such a way that some or all of their content
constitutes requirements 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 4210-1, Cycles — Safety requirements for bicycles — Part 1: Vocabulary
ISO 4210-2:2023, Cycles — Safety requirements for bicycles — Part 2: Requirements for city and trekking,
young adult, mountain and racing bicycles
ISO 4210-3:2023, Cycles — Safety requirements for bicycles — Part 3: Common test methods
3 Terms and definitions
For the purposes of this document, the terms and definitions given in ISO 4210-1 apply.
ISO and IEC maintain terminological databases for use in standardization at the following addresses:
— ISO Online browsing platform: available at https:// www .iso .org/ obp
— IEC Electropedia: available at https:// www .electropedia .org/
4 Test methods
4.1 Handlebar grips and plugs
4.1.1 Freezing test
Immerse the handlebar, with handlebar grips or plugs fitted, in water at room temperature for 1 h and
then place the handlebar in a freezer until the handlebar is at a temperature lower than −5 °C. Remove
the handlebar from the freezer and allow the temperature of the handlebar to reach −5 °C, and then
apply a force of 70 N to the grip or plug in the loosening direction as shown in Figure 1. Maintain the
force until the temperature of the handlebar has reached +5 °C. It shall be permitted to create a hole in
the plug to allow for the testing fixture to be fitted so long as the hole does not affect the seat of the plug
in the handlebar and the fixture does not contact the handlebar during the test.
Temperature is measured on the handlebar 3 cm from the grip towards the centre of the handlebar.
Key
1 handlebar grip
2 handlebar
3 drawing attachment
4 hooking ring
5 clearance
F force
NOTE The hooking ring can be divided.
Figure 1 — Example of handlebar grip drawing attachment
4.1.2 Hot water test
Immerse the handlebar, with handlebar grips fitted, in hot water of +60 °C ± 2 °C for 1 h. Remove the
handlebar from the hot water, allow the handlebar to stabilize at ambient temperature for 30 min, and
apply a force of 100 N to the grip in the loosening direction as shown in Figure 1. Maintain this force for
1 min.
4.2 Handlebar stem — Lateral bending test
For stems which have a quill for insertion into a fork steerer, clamp the quill securely in a fixture to
the minimum insertion depth as specified in ISO 4210-2:2023, 4.7.3, or for stem extensions which
clamp directly on to an extended fork steerer, attach the extension to a fork steerer according to the
manufacturer's instructions and clamp this fork steerer securely in a fixture to the appropriate height.
Assemble a straight test bar to the stem, and apply a force of F at a distance of d laterally from the axis
of the stem as shown in Table 1 and Figure 2. Maintain this force for 1 min.
Table 1 — Forces and distances on handlebars
City and trekking
Bicycle type Young adult bicycle Mountain bicycle Racing bicycle
bicycle
Force, F
600 600 1 000 1 000
N
Distance, d
300 300 300 230
mm
a) Combined stem and quill b) Stem extension
Key
1 minimum insertion depth
2 clamping block
3 solid-steel bar
d distance
F force
Figure 2 — Handlebar stem — Lateral bending test
4.3 Handlebar and stem assembly — Lateral bending test
Assemble the handlebar and stem in accordance with the manufacturer's instructions. Align the grips
portion of the handlebar in a plane perpendicular to the steerer axis [see Figure 3 a) or Figure 4 a)].
If perpendicular alignment is not achievable within the manufacturer’s recommended range, then the
alignment shall be as close as possible. If perpendicular alignment is achievable in multiple positions,
or for stems with adjustable length or angle, fix the stem and handlebar in positions resulting in the
maximum bending moment with respect to the steerer axis. For permanently connected handlebar and
stem, e.g. by welding or brazing, install per manufacturer's instructions. For stems which have a quill
for insertion into a fork steerer, clamp the quill securely in a fixture to the minimum insertion depth, or
for stem extensions which clamp directly on to an extended fork steerer, attach the extension to a fork
steerer according to the manufacturer's instructions and clamp this fork steerer securely in a fixture
to the appropriate height. Apply a force of F (see Table 2) at a distance of 50 mm from the free end of
...
INTERNATIONAL ISO
STANDARD 4210-5
Second edition
2023-01
Corrected version
2023-08
Cycles — Safety requirements for
bicycles —
Part 5:
Steering test methods
Cycles — Exigences de sécurité pour les bicyclettes —
Partie 5: Méthodes d'essai de la direction
Reference number
© ISO 2023
All rights reserved. Unless otherwise specified, or required in the context of its implementation, 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 an intranet, without prior written permission. Permission can be requested from either ISO at the address below
or ISO’s member body in the country of the requester.
ISO copyright office
CP 401 • Ch. de Blandonnet 8
CH-1214 Vernier, Geneva
Phone: +41 22 749 01 11
Email: copyright@iso.org
Website: www.iso.org
Published in Switzerland
ii
Contents Page
Foreword .iv
Introduction .v
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Test methods . 1
4.1 Handlebar grips and plugs . 1
4.1.1 Freezing test . 1
4.1.2 Hot water test . 2
4.2 Handlebar stem — Lateral bending test . 2
4.3 Handlebar and stem assembly — Lateral bending test . 3
4.4 Handlebar stem — Forward bending test . 5
4.4.1 Test method for stage 1 . 5
4.4.2 Test method for stage 2 . 7
4.5 Handlebar to handlebar stem — Torsional security test . 7
4.6 Handlebar stem to fork steerer — Torsional security test . 7
4.7 Bar end to handlebar — Torsional security test . 8
4.8 Aerodynamic extensions to handlebar — Torsional security test . 9
4.9 Handlebar and stem assembly — Fatigue test . 10
4.9.1 Test method except drop handlebar . 10
4.9.2 Test method for drop handlebar .12
iii
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, in collaboration with the European Committee for Standardization (CEN)
Technical Committee CEN/TC 333, Cycles, in accordance with the Agreement on technical cooperation
between ISO and CEN (Vienna Agreement).
This second edition cancels and replaces the first edition (ISO 4210-5:2014), which has been technically
revised.
The main changes are as follows:
— improvement of 4.1.1;
— improvement of 4.3;
— improvement of 4.4;
— increase in test torque for 4.6;
— improvement of 4.9.
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.
This corrected version of ISO 4210-5:2023 incorporates the following correction:
— Figure 10 a) has been corrected.
iv
Introduction
This document has been developed in response to demand throughout the world, and the aim has been
to ensure that bicycles manufactured in conformity with this document 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 should be used on public roads, national regulations apply.
v
INTERNATIONAL STANDARD ISO 4210-5:2023(E)
Cycles — Safety requirements for bicycles —
Part 5:
Steering test methods
1 Scope
This document specifies the steering test methods for ISO 4210-2.
2 Normative references
The following documents are referred to in the text in such a way that some or all of their content
constitutes requirements 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 4210-1, Cycles — Safety requirements for bicycles — Part 1: Vocabulary
ISO 4210-2:2023, Cycles — Safety requirements for bicycles — Part 2: Requirements for city and trekking,
young adult, mountain and racing bicycles
ISO 4210-3:2023, Cycles — Safety requirements for bicycles — Part 3: Common test methods
3 Terms and definitions
For the purposes of this document, the terms and definitions given in ISO 4210-1 apply.
ISO and IEC maintain terminological databases for use in standardization at the following addresses:
— ISO Online browsing platform: available at https:// www .iso .org/ obp
— IEC Electropedia: available at https:// www .electropedia .org/
4 Test methods
4.1 Handlebar grips and plugs
4.1.1 Freezing test
Immerse the handlebar, with handlebar grips or plugs fitted, in water at room temperature for 1 h and
then place the handlebar in a freezer until the handlebar is at a temperature lower than −5 °C. Remove
the handlebar from the freezer and allow the temperature of the handlebar to reach −5 °C, and then
apply a force of 70 N to the grip or plug in the loosening direction as shown in Figure 1. Maintain the
force until the temperature of the handlebar has reached +5 °C. It shall be permitted to create a hole in
the plug to allow for the testing fixture to be fitted so long as the hole does not affect the seat of the plug
in the handlebar and the fixture does not contact the handlebar during the test.
Temperature is measured on the handlebar 3 cm from the grip towards the centre of the handlebar.
Key
1 handlebar grip
2 handlebar
3 drawing attachment
4 hooking ring
5 clearance
F force
NOTE The hooking ring can be divided.
Figure 1 — Example of handlebar grip drawing attachment
4.1.2 Hot water test
Immerse the handlebar, with handlebar grips fitted, in hot water of +60 °C ± 2 °C for 1 h. Remove the
handlebar from the hot water, allow the handlebar to stabilize at ambient temperature for 30 min, and
apply a force of 100 N to the grip in the loosening direction as shown in Figure 1. Maintain this force for
1 min.
4.2 Handlebar stem — Lateral bending test
For stems which have a quill for insertion into a fork steerer, clamp the quill securely in a fixture to
the minimum insertion depth as specified in ISO 4210-2:2023, 4.7.3, or for stem extensions which
clamp directly on to an extended fork steerer, attach the extension to a fork steerer according to the
manufacturer's instructions and clamp this fork steerer securely in a fixture to the appropriate height.
Assemble a straight test bar to the stem, and apply a force of F at a distance of d laterally from the axis
of the stem as shown in Table 1 and Figure 2. Maintain this force for 1 min.
Table 1 — Forces and distances on handlebars
City and trekking
Bicycle type Young adult bicycle Mountain bicycle Racing bicycle
bicycle
Force, F
600 600 1 000 1 000
N
Distance, d
300 300 300 230
mm
a) Combined stem and quill b) Stem extension
Key
1 minimum insertion depth
2 clamping block
3 solid-steel bar
d distance
F force
Figure 2 — Handlebar stem — Lateral bending test
4.3 Handlebar and stem assembly — Lateral bending test
Assemble the handlebar and stem in accordance with the manufacturer's instructions. Align the grips
portion of the handlebar in a plane perpendicular to the steerer axis [see Figure 3 a) or Figure 4 a)].
If perpendicular alignment is not achievable within the manufacturer’s recommended range, then the
alignment shall be as close as possible. If perpendicular alignment is achievable in multiple positions,
or for stems with adjustable length or angle, fix the stem and handlebar in positions resulting in the
maximum bending moment with respect to the steerer axis. For permanently connected handlebar and
stem, e.g. by welding or brazing, install per manufacturer's instructions. For stems which have a quill
for insertion into a fork steerer, clamp the quill securely in a fixture to the minimum insertion depth, or
for stem extensions which clamp directly on to an extended fork steerer, attach the extension to a fork
steerer according to the manufacturer's instructions and clamp this fork steerer securely in a fixture
to the appropriate height. Apply a force of F
...
NORME ISO
INTERNATIONALE 4210-5
Deuxième édition
2023-01
Cycles — Exigences de sécurité pour
les bicyclettes —
Partie 5:
Méthodes d'essai de la direction
Cycles — Safety requirements for bicycles —
Part 5: Steering test methods
Numéro de référence
DOCUMENT PROTÉGÉ PAR COPYRIGHT
© ISO 2023
Tous droits réservés. Sauf prescription différente ou nécessité dans le contexte de sa mise en œuvre, aucune partie de cette
publication ne peut être reproduite ni utilisée sous quelque forme que ce soit et par aucun procédé, électronique ou mécanique,
y compris la photocopie, ou la diffusion sur l’internet ou sur un intranet, sans autorisation écrite préalable. Une autorisation peut
être demandée à l’ISO à l’adresse ci-après ou au comité membre de l’ISO dans le pays du demandeur.
ISO copyright office
Case postale 401 • Ch. de Blandonnet 8
CH-1214 Vernier, Genève
Tél.: +41 22 749 01 11
E-mail: copyright@iso.org
Web: www.iso.org
Publié en Suisse
ii
Sommaire Page
Avant-propos .iv
Introduction .v
1 Domaine d'application .1
2 Références normatives .1
3 Termes et définitions . 1
4 Méthodes d'essai . 1
4.1 Poignées et bouchons de guidon . 1
4.1.1 Essai de gel-dégel . 1
4.1.2 Essai à l'eau chaude . 2
4.2 Potence de guidon — Essai de flexion latérale . 2
4.3 Ensemble guidon et potence — Essai de flexion latérale . 3
4.4 Potence de guidon — Essai de flexion vers l'avant . 5
4.4.1 Méthode d'essai pour l'étape 1 . 5
4.4.2 Méthode d'essai pour l'étape 2 . 7
4.5 Liaison guidon-potence de guidon — Essai de sécurité en torsion . 7
4.6 Liaison potence de guidon-tube pivot — Essai de sécurité en torsion . 8
4.7 Liaison prolongateur de guidon-guidon — Essai de sécurité en torsion . 8
4.8 Liaison extensions aérodynamiques-guidon — Essai de sécurité en torsion . 9
4.9 Ensemble guidon-potence de guidon — Essai de fatigue . 10
4.9.1 Méthode d'essai sauf pour guidon abaissé . 10
4.9.2 Méthode d'essai pour guidon abaissé .12
iii
Avant-propos
L'ISO (Organisation internationale de normalisation) est une fédération mondiale d'organismes
nationaux de normalisation (comités membres de l'ISO). L'élaboration des Normes internationales est
en général confiée aux comités techniques de l'ISO. Chaque comité membre intéressé par une étude
a le droit de faire partie du comité technique créé à cet effet. Les organisations internationales,
gouvernementales et non gouvernementales, en liaison avec l'ISO participent également aux travaux.
L'ISO collabore étroitement avec la Commission électrotechnique internationale (IEC) en ce qui
concerne la normalisation électrotechnique.
Les procédures utilisées pour élaborer le présent document et celles destinées à sa mise à jour sont
décrites dans les Directives ISO/IEC, Partie 1. Il convient, en particulier de prendre note des différents
critères d'approbation requis pour les différents types de documents ISO. Le présent document
a été rédigé conformément aux règles de rédaction données dans les Directives ISO/IEC, Partie 2
(voir www.iso.org/directives).
L'attention est appelée sur le fait que certains des éléments du présent document peuvent faire l'objet de
droits de propriété intellectuelle ou de droits analogues. L'ISO ne saurait être tenue pour responsable
de ne pas avoir identifié de tels droits de propriété et averti de leur existence. Les détails concernant
les références aux droits de propriété intellectuelle ou autres droits analogues identifiés lors de
l'élaboration du document sont indiqués dans l'Introduction et/ou dans la liste des déclarations de
brevets reçues par l'ISO (voir www.iso.org/brevets).
Les appellations commerciales éventuellement mentionnées dans le présent document sont données
pour information, par souci de commodité, à l’intention des utilisateurs et ne sauraient constituer un
engagement.
Pour une explication de la nature volontaire des normes, la signification des termes et expressions
spécifiques de l'ISO liés à l'évaluation de la conformité, ou pour toute information au sujet de l'adhésion
de l'ISO aux principes de l’Organisation mondiale du commerce (OMC) concernant les obstacles
techniques au commerce (OTC), voir www.iso.org/avant-propos.
Le présent document a été élaboré par le comité technique ISO/TC 149, Cycles, sous-comité SC 1, Cycles et
ses principaux sous-ensembles, en collaboration avec le comité technique CEN/TC 333, Cycles, du Comité
européen de normalisation (CEN), conformément à l’accord de coopération technique entre l’ISO et le
CEN (Accord de Vienne).
Cette seconde édition annule et remplace la première édition (ISO 4210-5:2014), qui a fait l'objet d'une
révision technique.
Les principales modifications sont les suivantes:
— amélioration de 4.1.1;
— amélioration de 4.3;
— amélioration de 4.4;
— augmentation du couple d'essai pour 4.6;
— amélioration de 4.9.
Une liste de toutes les parties de la série ISO 4210 est disponible sur le site web de l'ISO.
Il convient que l’utilisateur adresse tout retour d’information ou toute question concernant le présent
document à l’organisme national de normalisation de son pays. Une liste exhaustive desdits organismes
se trouve à l’adresse www.iso.org/fr/members.html.
La présente version française de l'ISO 4210-5:2023 correspond à la version anglaise corrigée du 2023-
08.
iv
Introduction
Le présent document a été élaboré pour répondre à une demande présente dans le monde entier, et son
objectif est de garantir que les bicyclettes fabriquées en conformité avec celui-ci seront aussi sûres que
possible. Les essais ont été conçus pour assurer la résistance et la durabilité des différents composants
et de la bicyclette dans son ensemble, en exigeant une qualité élevée à tous les niveaux et en prenant en
compte les aspects de sécurité dès la phase de conception.
Le domaine d’application a été restreint aux questions de sécurité et a spécifiquement évité la
normalisation des composants.
Si la bicyclette est utilisée sur la voie publique, les réglementations nationales s'appliquent.
v
NORME INTERNATIONALE ISO 4210-5:2023(F)
Cycles — Exigences de sécurité pour les bicyclettes —
Partie 5:
Méthodes d'essai de la direction
1 Domaine d'application
Le présent document spécifie les méthodes d'essai de la direction pour l'ISO 4210-2.
2 Références normatives
Les documents suivants sont cités dans le texte de sorte qu’ils constituent, pour tout ou partie de leur
contenu, des exigences du présent document. Pour les références datées, seule l’édition citée s’applique.
Pour les références non datées, la dernière édition du document de référence s'applique (y compris les
éventuels amendements).
ISO 4210-1, Cycles — Exigences de sécurité pour les bicyclettes — Partie 1: Vocabulaire
ISO 4210-2:2023, Cycles — Exigences de sécurité pour les bicyclettes — Partie 2: Exigences pour bicyclettes
de ville et tout chemin (trekking), jeunes adultes, tout-terrain et de course
ISO 4210-3:2023, Cycles — Exigences de sécurité pour les bicyclettes — Partie 3: Méthodes d'essai
communes
3 Termes et définitions
Pour les besoins du présent document, les termes et définitions donnés dans l’ISO 4210-1 s'appliquent.
L’ISO et l’IEC tiennent à jour des bases de données terminologiques destinées à être utilisées en
normalisation, consultables aux adresses suivantes:
— ISO Online browsing platform: disponible à l’adresse https:// www .iso .org/ obp
— IEC Electropedia: disponible à l’adresse http:// www .electropedia .org/
4 Méthodes d'essai
4.1 Poignées et bouchons de guidon
4.1.1 Essai de gel-dégel
Plonger le guidon muni de ses poignées ou de ses bouchons de guidon dans de l'eau à température
ambiante pendant 1 h, puis placer le guidon dans un congélateur jusqu'à ce que le guidon soit à une
température inférieure à – 5 °C. Sortir le guidon du congélateur, attendre que la température du guidon
soit de – 5 °C, puis appliquer une force de 70 N à la poignée ou au bouchon dans le sens de désassemblage,
comme illustré à la Figure 1. Maintenir la force jusqu'à ce que la température du guidon soit de + 5 °C. Il
est permis de percer un trou dans le bouchon pour permettre l'installation du dispositif d'essai tant que
le trou n'affecte pas l'assise du bouchon dans le guidon et que le dispositif d'essai n'entre pas en contact
avec le guidon pendant l'essai.
La température est mesurée sur le guidon à 3 cm de la poignée vers le centre du guidon.
Légende
1 poignée du guidon
2 guidon
3 accessoire d'extraction
4 bague d'accrochage
5 jeu de fonctionnement
F force
NOTE La bague d'accrochage peut être divisée.
Figure 1 — Exemple d'accessoire d'extraction d'une poignée de guidon
4.1.2 Essai à l'eau chaude
Plonger le guidon muni de ses poignées dans de l'eau chaude à + 60 °C ± 2 °C pendant 1 h. Retirer le
guidon de l'eau chaude, laisser sa température se stabiliser à température ambiante pendant 30 min,
puis appliquer une force de 100 N à la poignée dans le sens de désassemblage, comme illustré à la
Figure 1. Maintenir cette force pendant 1 min.
4.2 Potence de guidon — Essai de flexion latérale
Pour les potences de guidon qui ont un arbre creux destiné à être inséré dans un tube pivot, serrer
rigidement l'arbre creux dans un dispositif de fixation à la profondeur minimale d'insertion spécifiée
dans l'ISO 4210-2:2023, 4.7.3, ou, pour les extensions de potence de guidon qui se fixent directement
sur un tube pivot rallongé, fixer l'extension sur le tube pivot selon les instructions du fabricant et
serrer rigidement ce tube pivot dans un dispositif de fixation placé à une hauteur appropriée. Fixer une
barre d'essai droite sur la potence de guidon et appliquer une force F à une distance de d latéralement
par rapport à l'axe de la potence de guidon comme indiqué dans le Tableau 1 et illustré à la Figure 2.
Maintenir cette force pendant 1 min.
Tableau 1 — Forces et distances sur les guidons
Bicyclette de ville et Bicyclette jeune Bicyclette tout
Type de bicyclette Bicyclette de course
tout chemin adulte terrain
Force, F
600 600 1 000 1 000
N
Distance, d
300 300 300 230
mm
a) Ensemble potence de guidon et arbre creux b) Extension de potence de guidon
Légende
1 profondeur minimale d'insertion
2 dispositif de serrage
3 barre d'acier pleine
d distance
F force
Figure 2 — Potence de guidon — Essai de flexion latérale
4.3 Ensemble guidon et potence — Essai de flexion latérale
Assembler le guidon et la potence de guidon selon les instructions du fabricant. Aligner la partie
poignées du guidon dans un plan perpendiculaire à l'axe du pivot [voir Figure 3 a) ou Figure 4 a)]. S'il
n'est pas possible d'obtenir un alignement perpendiculaire dans la plage recommandée par le fabricant,
l'alignement doit être aussi proche que possible. Si l'alignement perpendiculaire est réalisable dans
plusieurs positions, ou pour les potences dont la longueur ou l'angle sont réglables, fixer la potence et
le cintre dans des positions donnant lieu au moment de flexion maximal par rapport à l'axe du pivot.
Pour les guidons et potences reliés de manière permanente, p. ex. par soudure ou brasage, les installer
conformément aux instructions du fabricant. Pour les potences de guidon qui ont un arbre creux destiné
à être inséré dans un tube pivot, serrer rigidement l'arbre creux dans un dispositif de fixation à la
profondeur minimale d'insertion, ou, pour les extensions de potence de guidon qui se fixent directement
sur un tube pivot rallongé, fixer l'extension sur le tube pivot selon les instructions du fabricant et serrer
rigidement ce tube pivot dans un dispositif de fixation placé à une hauteur appropriée. Appliquer une
force F (voir Tableau 2) à une distance de 50 mm de l'extrémité libre du guidon et parallèlement à l'axe
du tube pivot comme illustré à la Figure 3 ou 4. Maintenir cette force pendant 1 min.
Tableau 2 — Forces exercées sur les guidons
Forces en newtons
Bicyclette de
Type de bicy- Bicyclette Bicyclette tout Bicyclette de
ville et tout
cl
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