ISO 3911-2021 PDF

Full title and description

ISO 3911:2021 — Wheels and rims for pneumatic tyres — Vocabulary, designation and marking. This International Standard defines terms, a system for designation and the marking requirements (content, location and minimum size) for wheels and rims intended for use with pneumatic tyres, to establish a uniform worldwide identification system.

Abstract

This document provides a vocabulary of fundamental terms related to wheels and rims for pneumatic tyres and specifies systems for designation and marking. It is intended to define core wheel and rim terminology rather than to catalogue all design features, and it specifies the content, placement and minimum lettering size for wheel and rim markings to support worldwide, consistent identification.

General information

• Status: Published
• Publication date: 30 June 2021
• Publisher: International Organization for Standardization (ISO)
• ICS / categories: 01.040.43; 43.040.50
• Edition / version: Edition 4 (2021)
• Number of pages: 19

Scope

ISO 3911:2021 applies to wheels and rims intended for use with pneumatic tyres. It establishes vocabulary (terms and definitions), systems for designation, and rules for marking (what information must appear on a wheel/rim, where it must be located and the minimum size of markings). The standard focuses on fundamental terms and a uniform identification system rather than an exhaustive list of all wheel design features.

Key topics and requirements

• Standardized vocabulary and definitions for wheels, rims and associated parts (wheel disc, rim base, bead seat, etc.).
• System for designation of wheels and rims to enable consistent identification across manufacturers and markets.
• Requirements for marking: mandatory content (identification/designation data), recommended placement on the wheel or rim, and minimum lettering sizes for legibility.
• Illustrative figures to show parts and typical marking locations (informative diagrams supporting the definitions and marking rules).
• Designed to establish a worldwide, uniform identification system for wheels and rims used with pneumatic tyres.

Typical use and users

Primary users include vehicle manufacturers (OEMs), wheel-and-rim manufacturers, tyre manufacturers, aftermarket wheel suppliers, testing and certification laboratories, conformity assessment bodies and regulatory agencies. Design and quality engineers use ISO 3911 to ensure consistent naming, marking and identification; procurement and maintenance teams use it to verify correct wheel/rim specifications and traceability.

Related standards

ISO 3911:2021 revises and replaces earlier editions ISO 3911:2004 (3rd ed.) and ISO 3911:1998 (2nd ed.), and continues the ISO work on wheel terminology and marking. Related work areas and committees include ISO/TC 22/SC 33 (wheels) and ISO/TC 31 (tyres, rims and valves), which develop complementary standards addressing tyre dimensions, rim design and vehicle component terminology.

Keywords

wheel; rim; pneumatic tyre; vocabulary; terminology; designation; marking; identification; rim marking; wheel marking; ISO 3911

FAQ

Q: What is this standard?

A: ISO 3911:2021 is an International Standard titled "Wheels and rims for pneumatic tyres — Vocabulary, designation and marking" that defines terms and specifies marking and designation rules for wheels and rims intended for pneumatic tyres.

Q: What does it cover?

A: It covers vocabulary (terms and definitions), a system for designation of wheels and rims, and the content, location and minimum size of markings on wheels and rims to enable uniform worldwide identification. It is focused on fundamental terms rather than a comprehensive list of all design features.

Q: Who typically uses it?

A: Vehicle and wheel manufacturers, tyre makers, aftermarket suppliers, testing laboratories, certification bodies, regulators and maintenance/procurement teams use ISO 3911 to ensure consistent terminology and marking for traceability and compliance.

Q: Is it current or superseded?

A: ISO 3911:2021 is the current edition published 30 June 2021; it supersedes ISO 3911:2004 and earlier editions.

Q: Is it part of a series?

A: ISO 3911 is a standalone vocabulary/marking standard within the portfolio of ISO standards for road-vehicle components and tyre/rim topics managed by ISO/TC 22 and ISO/TC 31. It is part of ISO's broader work on vehicle component terminology and rim/tyre interfaces, and is referenced alongside related standards developed by these technical committees.

Q: What are the key keywords?

A: wheel, rim, pneumatic tyre, marking, designation, vocabulary, identification, rim marking, wheel identification.