ISO 18805:2026

Tyre classification — Agricultural, forestry and construction machines

This document specifies the classification codes of tyres for agricultural and forestry tractors and machines.

Classification des pneumatiques — Machines agricoles, engins forestiers et engins de construction

ISO 18805:2017 spécifie les codes de classification de tracteurs et machines agricoles et forestières.

General Information

• Status: Published
• Publication Date: 01-Jun-2026
• ICS: 83.160.30 - Tyres for agricultural machinery
• Technical Committee: ISO/TC 31/SC 5 - Agricultural tyres and rims
• Drafting Committee: ISO/TC 31/SC 5 - Agricultural tyres and rims
• Current Stage: 6060 - International Standard published
• Start Date: 02-Jun-2026
• Due Date: 20-Jun-2027
• Completion Date: 02-Jun-2026

Relations

• Revises: ISO 18805:2017 - Tyre classification — Agricultural, forestry and construction machines
• Effective Date: 22-Jun-2024

Overview

ISO 18805:2026 – Tyre Classification for Agricultural, Forestry and Construction Machines is an international standard developed by ISO, covering the classification codes for tyres used on agricultural and forestry tractors, as well as related machines. This standard provides standardized terminology and nomenclature, enabling manufacturers, fleet managers, and end-users to clearly identify tyre types and select the right products for specific working conditions. Updated from its previous version, ISO 18805:2026 includes revised classification codes, ensuring relevance to modern machinery and operational needs.

Key Topics

• Tyre Classification Codes: The document specifies codes and nomenclature for tyres based on their intended application, such as agricultural tractor drive-wheel service, steering-wheel service, implement service, lawn and garden service, logging and forestry service, and high flotation service.
• Purpose-Driven Tyre Definitions: Each tyre type is clearly defined by its application, e.g., drive/wheel tyres handling high-torque service or implement tyres used on machinery and trailers.
• Nomenclature and Markings: The standard sets out how optional classification codes should be used and displayed, separated from size markings on the tyre.
• Updated Table of Codes: ISO 18805:2026 includes a revised table of classification codes, ensuring users have current guidance reflecting technical advancements and evolving machinery functions.

Applications

The implementation of ISO 18805:2026 is essential for various stakeholders in the agricultural, forestry, and construction sectors seeking enhanced compatibility, reliability, and efficiency in tyre usage. Practical applications include:

• Tyre Manufacturers: Enables globally consistent labelling and classification, aiding in product development and marketing.
• Machinery OEMs: Facilitates selection of appropriate tyres for tractors, harvesters, and construction equipment, depending on operating requirements.
• Equipment Fleet Operators: Assists in fleet management by standardizing tyre specifications and service types, reducing downtime due to incorrect tyre selection.
• Dealers and Distributors: Provides a reference framework for advising customers on suitable tyre choices, improving service quality and customer satisfaction.
• Field Operations: Ensures the right tyre type is used, whether for high-torque traction, flotation, low soil compaction, or specialized forestry and logging tasks.

By adopting ISO 18805:2026, organizations can achieve better equipment performance, minimize soil disturbance, and increase workplace safety through informed tyre selection.

Related Standards

To fully benefit from ISO 18805:2026, users may refer to these related international standards:

• ISO 4223-1: Definitions of terms used in the tyre industry - foundational for understanding terminology in ISO 18805:2026.
• ISO 4250 series: Covers various specifications for tyres and rims for agricultural machines.
• ISO/TC 31: Technical committee focusing on tyres, rims, and valves to ensure compatibility and safety across related standards.

ISO 18805:2026 is part of an integrated approach to tyre classification, supporting global best practices in machinery maintenance and operations for agricultural, forestry, and construction industries.

For further information or to obtain the latest copies of the referenced standards, visit the official ISO website at www.iso.org.

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Keywords: ISO 18805:2026, tyre classification, agricultural machines, forestry machines, construction machine tyres, tyre codes, tyre nomenclature, international standards, machinery tyres, equipment tyres, tyre standardization, ISO tyre standards.

Standards Content (Sample)

International
Standard
ISO 18805
Second edition
Tyre classification — Agricultural,
2026-06
forestry and construction machines
Classification des pneumatiques — Machines agricoles, engins
forestiers et engins de construction
Reference number
© ISO 2026
All rights reserved. Unless otherwise specified, or required in the context of its implementation, no part of this publication may
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or ISO’s member body in the country of the requester.
ISO copyright office
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Published in Switzerland
ii
Contents Page
Foreword .iv
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Tyre classification and tyre nomenclature . 1

iii
Foreword
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This document was prepared by Technical Committee ISO/TC 31, Tyres, rims and valves, Su
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