ISO 4210-9:2023

INTERNATIONAL ISO
STANDARD 4210-9
Second edition
2023-01
Cycles — Safety requirements for
bicycles —
Part 9:
Saddles and seat-post test methods
Cycles — Exigences de sécurité pour les bicyclettes —
Partie 9: Méthodes d'essai des selles et des tiges de selles
Reference number
© ISO 2023
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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 General . 1
4.2 Saddle/seat-post — Security test . 1
4.3 Saddle and saddle rail — Static strength test . 2
4.3.1 Saddle — Static strength test . 2
4.3.2 Saddle rail (composite) — Static strength test . 3
4.4 Saddle and seat-post assembly — Fatigue test . 4
4.4.1 General . 4
4.4.2 Test method . 4
4.5 Seat-post — Fatigue test and static strength test . 5
4.5.1 General . 5
4.5.2 Test method for stage 1 (fatigue test). 5
4.5.3 Test method for stage 2 (static strength test) . 7
4.5.4 Suspension seat-post — Static test . 8
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
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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.
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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 4210-9:2014), which has been technically
revised.
The main changes are as follows:
— improvement of 4.3.1;
— addition of 4.3.2;
— improvement of 4.4;
— addition of test condition for dropper/suspension dropper seat-post in 4.5;
— 4.5.3 has been changed to be only applicable if the seat-post is known to be constructed from
composite materials;
— addition of 4.5.4.
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 4210-9:2023(E)
Cycles — Safety requirements for bicycles —
Part 9:
Saddles and seat-post test methods
1 Scope
This document specifies saddle and seat-post 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 General
If a suspension seat-post is involved, the test may be conducted with the suspension system either free
to operate or locked. If it is locked, the pillar shall b
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