ISO 4223-2:1991

Overview

ISO 4223-2:1991, "Definitions of some terms used in the tyre industry - Part 2: Solid tyres," is an international vocabulary standard that provides bilingual (English/French) definitions for terms specifically related to solid tyres. Published as the second edition in 1991, it cancels and replaces the 1983 edition (with modifications to definitions 1.2 and 2.1). The standard clarifies general terminology as well as terms concerning structure, components and dimensions of solid tyres used in industrial and specialist wheel applications.

Key topics

This part of ISO 4223 focuses on precise word definitions rather than test methods or performance limits. Key topics covered include:

• General definitions: e.g., new solid tyre, rolling resistance (Fr) - with the SI unit convention (newton metre per metre, N·m/m) and its equivalence to drag force in newtons.
• Structure-related terms: e.g., solid tyre for pneumatic-tyre rims, cylindrical (pressed-on) base, conical base.
• Material and function classifications: e.g., anti‑static solid tyre, conductive solid tyre, oil‑resistant solid tyre, high load capacity solid tyre.
• Component names: e.g., base reinforcement (material of low extensibility used to retain the tyre on the rim).
• Dimensional terms: e.g., cushion height, nominal rim (wheel) diameter, solid tyre base width, overall (outside) diameter, interference fit.
• Bilingual presentation (English/French) to support international use.

Applications and users

ISO 4223-2 is a reference vocabulary that improves clarity and consistency across documentation, design, procurement and regulation. Typical users include:

• Tyre and wheel manufacturers and designers (standardized terminology for drawings and specifications)
• Quality and testing laboratories (consistent term usage in reports)
• Procurement and maintenance teams (accurate part descriptions and ordering)
• Regulatory bodies and standards committees (harmonized language across standards)
• Technical translators and multilingual documentation teams (bilingual term source)

By adopting the standardized vocabulary, organizations reduce ambiguity in specifications, improve communication across supply chains, and support international trade.

Related standards

• ISO 4223-1 - Definitions relating to pneumatic tyres (Part 1)
• ISO 3877 - Tyres, valves and tubes - list of equivalent terms in other languages
• ISO 3911 - Wheels/rims - nomenclature, designation, marking and units of measurement

Keywords: ISO 4223-2:1991, solid tyre definitions, tyre industry standards, solid tyres, tyre terminology, vocabulary standard.