SIST EN ISO 4210-2:2023

Cycles - Safety requirements for bicycles - Part 2: Requirements for city and trekking, young adult, mountain and racing bicycles (ISO 4210-2:2023)

This document specifies safety and performance requirements for the design, assembly, and testing of bicycles and sub-assemblies, and lays down guidelines for manufacturer’s instructions on the use and care of such bicycles.
This document applies to young adult bicycles with maximum saddle height of 635 mm or more and less than 750 mm, city and trekking bicycles, mountain bicycles, and racing bicycles that have a maximum saddle height of 635 mm or more including folding bicycles.
This document does not apply to specialized types of bicycle, such as delivery bicycles, recumbent bicycles, tandems, BMX bicycles, and bicycles designed and equipped for use in severe applications such as sanctioned competition events, stunting, or aerobatic manoeuvres.
NOTE      For bicycles with a maximum saddle height of 435 mm or less, see national regulations for ride-on toys, and with a maximum saddle height of more than 435 mm and less than 635 mm, see ISO 8098.

Fahrräder - Sicherheitstechnische Anforderungen an Fahrräder - Teil 2: Anforderungen für City- und Trekkingfahrräder, Jugendfahrräder, Geländefahrräder (Mountainbikes) und Rennräder (ISO 4210-2:2023)

Dieser Teil von ISO 4210 legt sicherheitstechnische und leistungsbezogene Anforderungen an konstruktive Ausführung, Zusammenbau und Prüfung von Fahrrädern und Baugruppen fest, die über eine in Tabelle 1 festgelegte Sattelhöhe verfügen, und stellt Richtlinien für das Benutzerhandbuch des Herstellers hinsichtlich der Benutzung und Pflege dieser Fahrräder bereit.
Dieser Teil von ISO 4210 gilt für Jugendfahrräder mit einer maximalen Sattelhöhe von 635 mm oder höher, aber weniger als 750 mm, City- und Trekkingfahrräder, Geländefahrräder und Rennräder, die über eine maximale Sattelhöhe von 635 mm oder höher verfügen, sowie Falträder (siehe Tabelle 1 und Bild 1).
Dieser Teil der ISO 4210 gilt nicht für spezialisierte Fahrradtypen wie Lastenfahrräder, Liegefahrräder, Tandems, BMX Fahrräder und Fahrräder, die für harte Anwendungen wie genehmigte Wettbewerbsveranstaltungen, Trickfahrten oder Kunstsprungfiguren ausgelegt und ausgerüstet sind.
ANMERKUNG   Bei Fahrrädern mit einer maximalen Sattelhöhe von 435 mm oder weniger siehe ISO 8124 1 [1] und bei einer maximalen Sattelhöhe von mehr als 435 mm und weniger als 635 mm siehe ISO 8098 [2].
[Tabelle 1]
[Bild 1]

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 4210-2:2023)

Le présent document spécifie les exigences de sécurité et de performance à observer lors de la conception, de l'assemblage et des essais des bicyclettes et de leurs sous-ensembles, et précise les lignes directrices concernant les instructions d'utilisation et d'entretien fournies par les fabricants de ces bicyclettes.
Le présent document s'applique aux bicyclettes jeunes adultes ayant une hauteur maximale de selle supérieure ou égale à 635 mm et inférieure à 750 mm, aux bicyclettes de ville et tout chemin, aux bicyclettes tout terrain et aux bicyclettes de course ayant une hauteur maximale de selle supérieure ou égale à 635 mm, y compris les bicyclettes pliantes.
Le présent document ne s'applique pas aux types spécialisés de bicyclettes comme les bicyclettes de livraison, les bicyclettes couchées, les tandems, les bicyclettes BMX et les bicyclettes conçues et équipées pour une utilisation dans des usages sévères telles que des compétitions réglementées, des cascades ou des figures acrobatiques.
NOTE          Pour les bicyclettes dont la hauteur maximale de selle est inférieure ou égale à 435 mm, se reporter aux réglementations nationales sur les jouets à enfourcher, et pour une hauteur maximale de selle supérieure à 435 mm et inférieure à 635 mm, voir l'ISO 8098.

Kolesa - Varnostne zahteve za kolesa - 2. del: Zahteve za mestna in treking kolesa, kolesa za mlade, gorska in tekmovalna kolesa (ISO 4210-2:2023)

Ta dokument določa varnostne in tehnične zahteve za zasnovo, sestavo in preskušanje koles in njihovih podsestavov z višino sedeža, ter določa smernice za proizvajalčeva navodila za uporabo in nego takšnih koles.
Ta dokument se uporablja za kolesa za mlade z maksimalno višino sedeža najmanj 635 mm in največ 750 mm, mestna in treking kolesa, gorska kolesa in tekmovalna kolesa z maksimalno višino sedeža najmanj 635 mm, vključno z zložljivimi kolesi.
Ta dokument se ne uporablja za specializirane vrste koles, na primer dostavna kolesa, ležeča kolesa, tandemska kolesa, kolesa BMX in kolesa, zasnovana in opremljena za uporabo v zahtevnih pogojih, na primer na sankcioniranih tekmovanjih, za izvajanje trikov in akrobacij.
OPOMBA:   Za kolesa z maksimalno višino sedeža 435 mm ali manj glej nacionalne predpise za otroška igralna vozila, za kolesa z maksimalno višino sedeža najmanj 435 mm in največ 635 mm pa glej standard ISO 8098.

General Information

• Status: Published
• Public Enquiry End Date: 19-Jan-2022
• Publication Date: 14-Mar-2023
• ICS: 43.150 - Cycles
• ICS: 97.220.40 - Outdoor and water sports equipment
• Technical Committee: SPO - Sports
• Current Stage: 6060 - National Implementation/Publication (Adopted Project)
• Start Date: 02-Mar-2023
• Due Date: 07-May-2023
• Completion Date: 15-Mar-2023
• Ref Project: EN ISO 4210-2:2023 - Cycles - Safety requirements for bicycles - Part 2: Requirements for city and trekking, young adult, mountain and racing bicycles (ISO 4210-2:2023)

Relations

• Replaces: SIST EN ISO 4210-2:2015 - Cycles - Safety requirements for bicycles - Part 2: Requirements for city and trekking, young adult, mountain and racing bicycles (ISO 4210-2:2015)
• Effective Date: 01-Apr-2023

Standards Content (Sample)

SLOVENSKI STANDARD
SIST EN ISO 4210-2:2023
01-april-2023
Nadomešča:
SIST EN ISO 4210-2:2015
Kolesa - Varnostne zahteve za kolesa - 2. del: Zahteve za mestna in treking kolesa,
kolesa za mlade, gorska in tekmovalna kolesa (ISO 4210-2:2023)
Cycles - Safety requirements for bicycles - Part 2: Requirements for city and trekking,
young adult, mountain and racing bicycles (ISO 4210-2:2023)
Fahrräder - Sicherheitstechnische Anforderungen an Fahrräder - Teil 2: Anforderungen
für City- und Trekkingfahrräder, Jugendfahrräder, Geländefahrräder (Mountainbikes) und
Rennräder (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-
2:2023)
Ta slovenski standard je istoveten z: EN ISO 4210-2:2023
ICS:
43.150 Kolesa Cycles
97.220.40 Oprema za športe na Outdoor and water sports
prostem in vodne športe equipment
SIST EN ISO 4210-2:2023 en,fr,de
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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SIST EN ISO 4210-2:2023

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SIST EN ISO 4210-2:2023


EN ISO 4210-2
EUROPEAN STANDARD

NORME EUROPÉENNE

January 2023
EUROPÄISCHE NORM
ICS 43.150 Supersedes EN ISO 4210-2:2015
English Version

Cycles - Safety requirements for bicycles - Part 2:
Requirements for city and trekking, young adult, mountain
and racing bicycles (ISO 4210-2:2023)
Cycles - Exigences de sécurité pour les bicyclettes - Fahrräder - Sicherheitstechnische Anforderungen an
Partie 2: Exigences pour bicyclettes de ville et tout Fahrräder - Teil 2: Anforderungen für City- und
chemin (trekking), jeunes adultes, tout-terrain et de Trekkingfahrräder, Jugendfahrräder, Geländefahrräder
course (ISO 4210-2:2023) (Mountainbikes) und Rennräder (ISO 4210-2:2023)
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 4210-2:2023 E
worldwide for CEN national Members.

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SIST EN ISO 4210-2:2023
EN ISO 4210-2:2023 (E)
Contents Page
European foreword . 3

2

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SIST EN ISO 4210-2:2023
EN ISO 4210-2:2023 (E)
European foreword
This document (EN ISO 4210-2:2023) 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 4210-2:2015.
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 4210-2:2023 has been approved by CEN as EN ISO 4210-2:2023 without any
modification.

3

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SIST EN ISO 4210-2:2023

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SIST EN ISO 4210-2:2023
INTERNATIONAL ISO
STANDARD 4210-2
Third edition
2023-01
Cycles — Safety requirements for
bicycles —
Part 2:
Requirements for city and trekking,
young adult, mountain and racing
bicycles
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
Reference number
ISO 4210-2:2023(E)
© ISO 2023

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SIST EN ISO 4210-2:2023
ISO 4210-2:2023(E)
COPYRIGHT PROTECTED DOCUMENT
© 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
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SIST EN ISO 4210-2:2023
ISO 4210-2:2023(E)
Contents Page
Foreword .v
Introduction .vii
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 2
4 Requirements . 2
4.1 Toxicity . 2
4.2 Sharp edges . 2
4.3 Security and strength of safety-related fasteners . 2
4.3.1 Security of screws . 2
4.3.2 Minimum failure torque . 2
4.3.3 Folding bicycle mechanism . 2
4.4 Crack detection methods . 3
4.5 Exposed protrusions . 3
4.6 Brakes . 3
4.6.1 Braking systems . 3
4.6.2 Hand-operated brakes . 3
4.6.3 Attachment of brake assembly and cable requirements . 4
4.6.4 Brake-block and brake-pad assemblies — Security test . 5
4.6.5 Brake adjustment . 5
4.6.6 Hand-operated braking-system — Strength test . 5
4.6.7 Back-pedal braking system — Strength test. 5
4.6.8 Braking performance . 5
4.6.9 Brakes — Heat-resistance test . . 8
4.7 Steering . 8
4.7.1 Handlebar — Dimensions . 8
4.7.2 Handlebar grips and plugs . 9
4.7.3 Handlebar stem — Insertion-depth mark or positive stop . 9
4.7.4 Handlebar stem to fork steerer — Clamping requirements . 10
4.7.5 Steering stability . 10
4.7.6 Steering assembly — Static strength and security tests . 11
4.7.7 Handlebar and stem assembly — Fatigue test .12
4.8 Frames .12
4.8.1 Suspension-frames — Special requirements .12
4.8.2 Frame — Impact test (falling mass) . 13
4.8.3 Frame and front fork assembly — Impact test (falling frame) .13
4.8.4 Frame — Fatigue test with pedalling forces .13
4.8.5 Frame — Fatigue test with horizontal forces . .13
4.8.6 Frame — Fatigue test with a vertical force .13
4.8.7 Rear brake mount tests . 14
4.9 Front fork . 14
4.9.1 General . 14
4.9.2 Means of location of the axle and wheel retention . 14
4.9.3 Tyre clearance test — Suspension fork . 14
4.9.4 Front fork — Tensile test . 14
4.9.5 Front fork — Static bending test . 14
4.9.6 Front fork — Rearward impact test . 14
4.9.7 Front fork — Bending fatigue test plus rearward impact test .15
4.9.8 Forks intended for use with hub- or disc-brakes. 15
4.9.9 Steerer tube — fatigue test . 15
4.10 Wheels and tyre assembly . 16
4.10.1 Wheels and tyre assembly — Rotational accuracy — Concentricity
tolerance and lateral tolerance . 16
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SIST EN ISO 4210-2:2023
ISO 4210-2:2023(E)
4.10.2 Wheel and tyre assembly — Clearance . 16
4.10.3 Wheel and tyre assembly — Static strength test . 16
4.10.4 Wheels — Wheel retention . 16
4.10.5 Wheels — Quick-release devices — Operating features . 17
4.10.6 Wheel and tyre assembly — Greenhouse effect test for composite wheels . 17
4.10.7 Wheel and tyre assembly — Heat resistance tests for composite rims used
in conjunction with rim brake. 18
4.10.8 Wheel and tyre assembly — Overpressure test . 18
4.10.9 Wheel and tyre assembly —Information for users . 19
4.11 Front mudguard . 19
4.12 Pedals and pedal/crank drive system . 19
4.12.1 Pedal tread . 19
4.12.2 Pedal clearance .20
4.12.3 Pedal — Static strength test . 21
4.12.4 Pedal — Impact test . 21
4.12.5 Pedal — Dynamic durability test . 21
4.12.6 Drive system — Static strength test . 21
4.12.7 Crank assembly — Fatigue test . 22
4.13 Drive-chain and drive belt . 22
4.13.1 Drive-chain .22
4.13.2 Drive belt .22
4.14 Chain-wheel and belt-drive protective device . 22
4.14.1 Requirements .22
4.14.2 Chain-wheel disc and drive pulley disc diameter .23
4.14.3 Chain and drive belt protective device . 24
4.14.4 Combined front gear-change guide . . 25
4.15 Saddles and seat-posts . 25
4.15.1 Limiting dimensions .25
4.15.2 Seat-post — Insertion-depth mark or positive stop . 25
4.15.3 Saddle/seat-post — Security test . 26
4.15.4 Saddle and saddle rail — Static strength test . 26
4.15.5 Saddle and seat-post assembly — Fatigue test . 26
4.15.6 Seat-post — Fatigue test . 26
4.16 Spoke protector . 27
4.17 Luggage carriers . 27
4.18 Road test of a fully assembled bicycle. 27
4.19 Lighting systems and reflectors . 27
4.19.1 General . 27
4.19.2 Wiring harness . 27
4.19.3 Lighting systems .28
4.19.4 Reflectors .28
4.20 Warning device .28
5 Manufacturer's instructions .28
6 Marking . .30
6.1 Requirement .30
6.2 Durability test . 31
Annex A (informative) Steering geometry .32
Bibliography .33
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SIST EN ISO 4210-2:2023
ISO 4210-2:2023(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 third edition cancels and replaces the second edition (ISO 4210-2:2015), which has been technically
revised.
The main changes as follows:
— improvement of 4.3.2 Minimum failure torque;
— change in minimum braking performance value in Table 2 of 4.6.8.1.3;
— improvement of 4.6.9;
— improvement of 4.7.2;
— addition of a requirement for angle-adjustable handlebar stem in 4.7.6.3;
— addition of 4.8.7;
— addition of 4.9.8.3;
— addition of 4.9.9;
— re-arrangement of requirements for “Wheel and tyre assembly”, “Rims, tyres, and tubes”;
— improvement of 4.10.2;
— change in test force of 4.10.4.3;
— addition of 4.10.7;
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SIST EN ISO 4210-2:2023
ISO 4210-2:2023(E)
— improvement of 4.11;
— change in option c) of 4.14;
— addition of 4.15.4.2;
— improvement of 4.15.6;
— addition of icons in Clause 6.
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.
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SIST EN ISO 4210-2:2023
ISO 4210-2:2023(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.
For the purpose of improving the safety of luggage carriers, revision work of ISO 11243, referenced
in 4.17, is in progress. In case this revision work involves requirements for the entire bicycle, this
document will incorporate those requirements in the next revision.
If the bicycle should be used on public roads, national regulations apply.
vii
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SIST EN ISO 4210-2:2023

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SIST EN ISO 4210-2:2023
INTERNATIONAL STANDARD ISO 4210-2:2023(E)
Cycles — Safety requirements for bicycles —
Part 2:
Requirements for city and trekking, young adult, mountain
and racing bicycles
1 Scope
This document specifies safety and performance requirements for the design, assembly, and testing of
bicycles and sub-assemblies, and lays down guidelines for manufacturer’s instructions on the use and
care of such bicycles.
This document applies to young adult bicycles with maximum saddle height of 635 mm or more and less
than 750 mm, city and trekking bicycles, mountain bicycles, and racing bicycles that have a maximum
saddle height of 635 mm or more including folding bicycles.
This document does not apply to specialized types of bicycle, such as delivery bicycles, recumbent
bicycles, tandems, BMX bicycles, and bicycles designed and equipped for use in severe applications such
as sanctioned competition events, stunting, or aerobatic manoeuvres.
NOTE For bicycles with a maximum saddle height of 4
...

SLOVENSKI STANDARD
oSIST prEN ISO 4210-2:2022
01-januar-2022
Kolesa - Varnostne zahteve za kolesa - 2. del: Zahteve za mestna in treking kolesa,
kolesa za mlade, gorska in tekmovalna kolesa (ISO/DIS 4210-2:2021)
Cycles - Safety requirements for bicycles - Part 2: Requirements for city and trekking,
young adult, mountain and racing bicycles (ISO/DIS 4210-2:2021)
Fahrräder - Sicherheitstechnische Anforderungen an Fahrräder - Teil 2: Anforderungen
für City- und Trekkingfahrräder, Jugendfahrräder, Geländefahrräder (Mountainbikes) und
Rennräder (ISO/DIS 4210-2:2021)
Cycles - Exigences de sécurité des bicyclettes - Partie 2 : Exigences pour bicyclettes de
ville et tout chemin (trekking), jeunes adultes, tout terrain et de course (ISO/DIS 4210-
2:2021)
Ta slovenski standard je istoveten z: prEN ISO 4210-2
ICS:
43.150 Kolesa Cycles
97.220.40 Oprema za športe na Outdoor and water sports
prostem in vodne športe equipment
oSIST prEN ISO 4210-2:2022 en,fr,de
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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oSIST prEN ISO 4210-2:2022

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oSIST prEN ISO 4210-2:2022
DRAFT INTERNATIONAL STANDARD
ISO/DIS 4210-2
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 2:
Requirements for city and trekking, young adult, mountain
and racing bicycles
Cycles — Exigences de sécurité des bicyclettes —
Partie 2: Exigences pour bicyclettes de ville et tout chemin (trekking), jeunes adultes, tout terrain et de
course
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 4210-2:2021(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 4210-2:2022
ISO/DIS 4210-2:2021(E)
ISO/DIS 4210-2:2021(E)

Contents
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To update the Table of Contents please select it and press "F9".
Foreword . vi
Introduction . vii
1 Scope . 1
2 Normative references . 2
3 Terms and definitions . 2
4 Requirements . 2
4.1 Toxicity . 2
4.2 Sharp edges . 3
4.3 Security and strength of safety-related fasteners . 3
4.3.1 Security of screws . 3
4.3.2 Minimum failure torque . 3
4.3.3 Folding bicycle mechanism . 3
4.4 Crack detection methods. 3
4.5 Protrusions . 3
4.6 Brakes . 3
4.6.1 Braking systems . 3
4.6.2 Hand-operated brakes . 4
4.6.3 Attachment of brake assembly and cable requirements . 5
4.6.4 Brake-block and brake-pad assemblies — Security test . 5
4.6.5 Brake adjustment . 6
4.6.6 Hand-operated braking-system — Strength test . 6
4.6.7 Back-pedal braking system — Strength test . 6
4.6.8 Braking performance . 6
4.6.9 Brakes — Heat-resistance test . 9
4.7 Steering . 9
4.7.1 Handlebar — Dimensions . 9
4.7.2 Handlebar grips and plugs . 10
4.7.3 Handlebar stem — Insertion-depth mark or positive stop . 10
4.7.4 Handlebar stem to fork steerer — Clamping requirements . 10
4.7.5 Steering stability . 11
4.7.6 Steering assembly — Static strength and security tests . 11
4.7.7 Handlebar and stem assembly — Fatigue test . 13
4.8 Frames . 13
COPYRIGHT PROTECTED DOCUMENT
4.8.1 Suspension-frames — Special requirements. 13
© ISO 2021
4.8.2 Frame — Impact test (falling mass) . 13
All rights reserved. Unless otherwise specified, or required in the context of its implementation, no part of this publication may
4.8.3 Frame and front fork assembly — Impact test (falling frame) . 13
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 4.8.4 Frame — Fatigue test with pedalling forces . 14
below or ISO’s member body in the country of the requester.
4.8.5 Frame — Fatigue test with horizontal forces . 14
ISO copyright office
4.8.6 Frame — Fatigue test with a vertical force . 14
CP 401 • Ch. de Blandonnet 8
CH-1214 Vernier, Geneva
4.9 Front fork . 14
Phone: [phone]
4.9.1 General . 14
Fax: [phone]
4.9.2 Means of location of the axle and wheel retention . 14
Email: [e-mail]
Website: www.iso.org
4.9.3 Tyre clearance test — Suspension fork . 14
Published in Switzerland
4.9.4 Front fork — Tensile test . 14
4.9.5 Front fork — Static bending test . 15
ii © ISO 2021 – All rights reserved
© ISO 2021 – All rights reserved iii

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oSIST prEN ISO 4210-2:2022
ISO/DIS 4210-2:2021(E)
Contents
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To update the Table of Contents please select it and press "F9".
Foreword .vi
Introduction . vii
1 Scope . 1
2 Normative references . 2
3 Terms and definitions . 2
4 Requirements . 2
4.1 Toxicity . 2
4.2 Sharp edges . 3
4.3 Security and strength of safety-related fasteners . 3
4.3.1 Security of screws . 3
4.3.2 Minimum failure torque . 3
4.3.3 Folding bicycle mechanism . 3
4.4 Crack detection methods . 3
4.5 Protrusions . 3
4.6 Brakes . 3
4.6.1 Braking systems . 3
4.6.2 Hand-operated brakes . 4
4.6.3 Attachment of brake assembly and cable requirements . 5
4.6.4 Brake-block and brake-pad assemblies — Security test . 5
4.6.5 Brake adjustment . 6
4.6.6 Hand-operated braking-system — Strength test . 6
4.6.7 Back-pedal braking system — Strength test . 6
4.6.8 Braking performance . 6
4.6.9 Brakes — Heat-resistance test . 9
4.7 Steering . 9
4.7.1 Handlebar — Dimensions . 9
4.7.2 Handlebar grips and plugs . 10
4.7.3 Handlebar stem — Insertion-depth mark or positive stop . 10
4.7.4 Handlebar stem to fork steerer — Clamping requirements . 10
4.7.5 Steering stability . 11
4.7.6 Steering assembly — Static strength and security tests . 11
4.7.7 Handlebar and stem assembly — Fatigue test . 13
4.8 Frames . 13
4.8.1 Suspension-frames — Special requirements . 13
4.8.2 Frame — Impact test (falling mass) . 13
4.8.3 Frame and front fork assembly — Impact test (falling frame) . 13
4.8.4 Frame — Fatigue test with pedalling forces . 14
4.8.5 Frame — Fatigue test with horizontal forces . 14
4.8.6 Frame — Fatigue test with a vertical force . 14
4.9 Front fork . 14
4.9.1 General . 14
4.9.2 Means of location of the axle and wheel retention . 14
4.9.3 Tyre clearance test — Suspension fork . 14
4.9.4 Front fork — Tensile test . 14
4.9.5 Front fork — Static bending test . 15
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oSIST prEN ISO 4210-2:2022
ISO/DIS 4210-2:2021(E)
4.9.6 Front fork — Rearward impact test .15
4.9.7 Front fork — Bending fatigue test plus rearward impact test .15
4.9.8 Forks intended for use with hub- or disc-brakes .15
4.9.9 Steerer tube — fatigue test .16
4.10 Wheels and wheel/tyre assembly .16
4.10.1 Wheels/tyre assembly — Rotational accuracy — Concentricity tolerance and lateral
tolerance.16
4.10.2 Wheel/tyre assembly — Clearance.16
4.10.3 Wheel/tyre assembly — Static strength test .16
4.10.4 Wheels — Wheel retention .17
4.10.5 Wheels — Quick-release devices — Operating features .17
4.10.6 Heat resistance tests for composite rims used in conjunction with rim brake .18
4.11 Rims, tyres, and tubes .18
4.11.1 General .18
4.11.2 Tyre inflation pressure .18
4.11.3 Combined tyre and wheel overpressure test .18
4.11.4 Tubular tyres and rims .19
4.11.5 Rim-wear .19
4.11.6 Greenhouse effect test for composite wheels .19
4.12 Front mudguard .19
4.13 Pedals and pedal/crank drive system .19
4.13.1 Pedal tread .19
4.13.2 Pedal clearance .20
4.13.3 Pedal — Static strength test .21
4.13.4 Pedal — Impact test .21
4.13.5 Pedal — Dynamic durability test .21
4.13.6 Drive system — Static strength test.21
4.13.7 Crank assembly — Fatigue test .22
4.14 Drive-chain and drive belt .22
4.14.1 Drive-chain .22
4.14.2 Drive belt .22
4.15 Chain-wheel and belt-drive protective device .22
4.15.1 Requirements .22
4.15.2 Chain-wheel disc and drive pulley disc diameter .22
4.15.3 Chain and drive belt protective device .23
4.15.4 Combined front gear-change guide .24
4.16 Saddles and seat-posts .25
4.16.1 Limiting dimensions .25
4.16.2 Seat-post — Insertion-depth mark or positive stop .25
4.16.3 Saddle/seat-post — Security test .25
4.16.4 Saddle and saddle rail — Static strength test.26
4.16.5 Saddle and seat-post assembly — Fatigue test .26
4.16.6 Seat-post — Fatigue test .26
4.17 Spoke protector .26
4.18 Luggage carriers .26
4.19 Road test of a fully assembled bicycle .27
4.20 Lighting systems and reflectors .27
4.20.1 General .27
4.20.2 Wiring harness .27
4.20.3 Lighting systems .27
4.20.4 Reflectors .27
4.21 Warning device .28
5 Manufacturer's instructions .28
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oSIST prEN ISO 4210-2:2022
ISO/DIS 4210-2:2021(E)
6 Marking . 29
6.1 Requirement . 29
6.2 Durability test . 30
Annex A (informative) Steering geometry . 31
Bibliography . 32

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oSIST prEN ISO 4210-2:2022
ISO/DIS 4210-2:2021(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 4210-2:2015), 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.
vi © ISO 2021 – All rights reserved

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oSIST prEN ISO 4210-2:2022
ISO/DIS 4210-2:2021(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.
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oSIST prEN ISO 4210-2:2022

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oSIST prEN ISO 4210-2:2022
DRAFT INTERNATIONAL STANDARD ISO/DIS 4210-2:2021(E)

1 Cycles — Safety requirements for bicycles — Part 2: Requirements
2 for city and trekking, young adult, mountain and racing bicycles
3 1 Scope
4 This part of ISO 4210 specifies safety and performance requirements for the design, assembly, and testing
5 of bicycles and sub-assemblies having saddle height as given in Table 1, and lays down guideline
...