SIST EN ISO 4210-5:2023

Cycles - Safety requirements for bicycles - Part 5: Steering test methods (ISO 4210-5:2023)

This document specifies the steering test methods for ISO 4210‑2.

Fahrräder - Sicherheitstechnische Anforderungen an Fahrräder - Teil 5: Prüfverfahren für die Lenkung (ISO 4210-5:2023)

Dieses Dokument legt die Prüfverfahren für die Lenkung nach ISO 4210-2 fest.

Cycles - Exigences de sécurité pour les bicyclettes - Partie 5: Méthodes d'essai de la direction (ISO 4210-5:2023)

Le présent document spécifie les méthodes d'essai de la direction pour l'ISO 4210-2.

Kolesa - Varnostne zahteve za kolesa - 5. del: Preskusne metode za krmila (ISO 4210-5:2023)

Ta dokument določa preskusne metode za krmila za standard ISO 4210-2.

General Information

• Status: Published
• Public Enquiry End Date: 19-Jan-2022
• Publication Date: 13-Mar-2023
• ICS: 43.150 - Cycles
• Technical Committee: SPO - Sports
• Current Stage: 6060 - National Implementation/Publication (Adopted Project)
• Start Date: 02-Mar-2023
• Due Date: 07-May-2023
• Completion Date: 14-Mar-2023
• Ref Project: EN ISO 4210-5:2023 - Cycles - Safety requirements for bicycles - Part 5: Steering test methods (ISO 4210-5:2023, Corrected version 2023-08)

Relations

• Replaces: SIST EN ISO 4210-5:2014 - Cycles - Safety requirements for bicycles - Part 5: Steering test methods (ISO 4210-5:2014, Corrected version 2015-02-01)
• Effective Date: 01-Apr-2023

Overview

EN ISO 4210-5:2023 / ISO 4210-5:2023 - Cycles - Safety requirements for bicycles - Part 5: Steering test methods - is the CEN-adopted part of the ISO 4210 series that specifies required steering test methods used to verify compliance with the safety requirements in ISO 4210-2. Published January 2023 (corrected version 2023-08), it supersedes EN ISO 4210-5:2014 and provides standardized laboratory procedures to assess the strength, durability and security of handlebars, stems, grips and steering attachments.

Key topics and technical requirements

The standard defines explicit test methods and conditions for steering components, including:

• Handlebar grips and plugs

  • Freezing test: pre-soak, freeze to below −5 °C, apply 70 N loosening force and maintain until +5 °C is reached.
  • Hot water test: immerse at +60 °C ± 2 °C for 1 h, stabilize 30 min, apply 100 N for 1 min.

• Handlebar stem - Lateral and forward bending tests

  • Lateral bending: specified forces and lever distances by bicycle type (e.g., 600 N or 1 000 N at defined distances).
  • Forward bending: staged procedures to check stem/quill integrity under forward loads.

• Handlebar & stem assembly - Lateral bending

  • Assembly alignment and positioning rules, force application at 50 mm from free end to reproduce realistic bending moments.

• Torsional security tests

  • Interfaces covered: handlebar-to-stem, stem-to-fork steerer, bar ends, and aerodynamic extensions - methods to verify resistance to rotational loosening.

• Fatigue testing

  • Endurance tests for handlebar and stem assemblies, with separate method details for drop (racing) handlebars.

• Normative references

  • Uses and cross-references ISO 4210-1 (vocabulary), ISO 4210-2 (requirements for bicycle categories), and ISO 4210-3 (common test methods).

Applications - who uses this standard

• Bicycle manufacturers and component suppliers - for design validation, production QA and component selection.
• Independent test laboratories - to perform repeatable steering strength, torsion and fatigue tests.
• Certification bodies and conformity assessors - to verify compliance with ISO 4210-2 safety requirements.
• Product engineers and R&D teams - to design safer steering systems and evaluate material/geometry choices.
• Regulators, importers and retailers - for assessing product safety claims and market surveillance.

Related standards and context

• Part of the ISO 4210 series covering bicycle safety (vocabulary, general requirements, test methods).
• Directly supports ISO 4210-2:2023 requirements for city & trekking, young adult, mountain and racing bicycles.
• Adopted by CEN - national implementation required by July 2023 in CEN member states.

Keywords: EN ISO 4210-5:2023, ISO 4210-5:2023, steering test methods, bicycle safety standard, handlebar testing, stem torsion test, fatigue testing, CEN.

Standards Content (Sample)

SLOVENSKI STANDARD
01-april-2023
Nadomešča:
SIST EN ISO 4210-5:2014
Kolesa - Varnostne zahteve za kolesa - 5. del: Preskusne metode za krmila (ISO
4210-5:2023)
Cycles - Safety requirements for bicycles - Part 5: Steering test methods (ISO 4210-
5:2023)
Fahrräder - Sicherheitstechnische Anforderungen an Fahrräder - Teil 5: Prüfverfahren
für die Lenkung (ISO 4210-5:2023)
Cycles - Exigences de sécurité pour les bicyclettes - Partie 5: Méthodes d'essai de la
direction (ISO 4210-5:2023)
Ta slovenski standard je istoveten z: EN ISO 4210-5:2023
ICS:
43.150 Kolesa Cycles
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EN ISO 4210-5
EUROPEAN STANDARD
NORME EUROPÉENNE
January 2023
EUROPÄISCHE NORM
ICS 43.150 Supersedes EN ISO 4210-5:2014
English Version
Cycles - Safety requirements for bicycles - Part 5: Steering
test methods (ISO 4210-5:2023)
Cycles - Exigences de sécurité pour les bicyclettes - Fahrräder - Sicherheitstechnische Anforderungen an
Partie 5: Méthodes d'essai de la direction (ISO 4210- Fahrräder - Teil 5: Prüfverfahren für die Lenkung (ISO
5:2023) 4210-5:2023)
This European Standard was approved by CEN on 13 January 2023.

CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this
European Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references
concerning such national standards may be obtained on application to the CEN-CENELEC Management Centre or to any CEN
member.
This European Standard exists in three official versions (English, French, German). A version in any other language made by
translation under the responsibility of a CEN member into its own language and notified to the CEN-CENELEC Management
Centre has the same status as the official versions.

CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia,
Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway,
Poland, Portugal, Republic of North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Türkiye and
United Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION

EUROPÄISCHES KOMITEE FÜR NORMUNG

CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels
© 2023 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 4210-5:2023 E
worldwide for CEN national Members.

Contents Page
European foreword . 3

European foreword
This document (EN ISO 4210-5:2023) has been prepared by Technical Committee ISO/TC 149 "Cycles"
in collaboration with Technical Committee CEN/TC 333 “Cycles” the secretariat of which is held by UNI.
This European Standard shall be given the status of a national standard, either by publication of an
identical text or by endorsement, at the latest by July 2023, and conflicting national standards shall be
withdrawn at the latest by July 2023.
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. CEN shall not be held responsible for identifying any or all such patent rights.
This document supersedes EN ISO 4210-5:2014.
Any feedback and questions on this document should be directed to the users’ national standards
body/national committee. A complete listing of these bodies can be found on the CEN website.
According to the CEN-CENELEC Internal Regulations, the national standards organizations of the
following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria,
Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland,
Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Republic of
North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Türkiye and the
United Kingdom.
Endorsement notice
The text of ISO 4210-5:2023 has been approved by CEN as EN ISO 4210-5:2023 without any
modification.
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 4210-5:2023(E)
ISO 4210-5:2023(E)
© 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: [phone]
Email: [e-mail]
Website: www.iso.org
Published in Switzerland
ii
ISO 4210-5:2023(E)
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
ISO 4210-5:2023(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, 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
ISO 4210-5:2023(E)
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.
ISO 4210-5:2023(E)
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 w
...