ISO 4210-4:2023 Cycles — 自転車の安全要件 — Part 4: 制動試験方法 | ページ 2

Foreword

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The procedures used to develop this document and those intended for its further maintenance are described in the ISO/IEC Directives, 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, 2 (see www.iso.org/directives ).

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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 4210-4:2014), which has been technically revised.

The main changes are as follows:

• improvement of 4.1.2;
• addition of test temperature requirement in 4.6.3 and 4.6.5;
• change in the method of calculating the braking distance in 4.6.3;
• addition of rolling resistance requirement and cooling requirement in 4.6.5.7;
• change in the test method to no cooling air of 4.7;
• addition of Annex B and Annex C.

A list of all parts in the ISO 4210 series can be found on the ISO website.

Introduction

This document has been developed in response to the demand throughout the world. The aim is to ensure that bicycles manufactured in conformity with this document will be as safe as is practically possible. The tests are 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 is limited to safety considerations and has specifically avoided standardization of components.

If the bicycle should be used on public roads, national regulations apply.

1 Scope

This document specifies the braking 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.

3 Terms and definitions

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

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