ISO 3739-2:2021
(Main)Industrial tyres and rims - Part 2: Pneumatic tyres (metric series) on 5 degrees tapered or flat base rims - Load ratings
Industrial tyres and rims - Part 2: Pneumatic tyres (metric series) on 5 degrees tapered or flat base rims - Load ratings
This document specifies the load ratings of the metric series of pneumatic tyres primarily intended for industrial vehicles for use on prepared surfaces. ISO 3739-1 deals with designation, dimensions and marking; ISO 3739-3 deals with rim contours for these tyres.
Pneumatiques et jantes industriels pour matériel de manutention — Partie 2: Pneumatiques (série millimétrique) montés sur jantes coniques à 5 degrés ou à base plate — Capacités de charge
Le présent document spécifie les capacités de charge des pneumatiques de la série millimétrique utilisés principalement sur les engins de manutention travaillant sur des surfaces aménagées. L’ISO 3739-1 traite de la désignation, des cotes et du marquage, et l’ISO 3739-3 traite des profils des jantes adaptés à ces pneumatiques.
General Information
- Status
- Published
- Publication Date
- 14-Jul-2021
- Technical Committee
- ISO/TC 31/SC 7 - Industrial tyres and rims
- Drafting Committee
- ISO/TC 31/SC 7 - Industrial tyres and rims
- Current Stage
- 9093 - International Standard confirmed
- Start Date
- 17-Dec-2025
- Completion Date
- 27-Dec-2025
Relations
- Effective Date
- 23-Apr-2020
Overview
ISO 3739-2:2021 is an international standard developed by ISO that specifies the load ratings for pneumatic industrial tyres of the metric series. These tyres are intended primarily for industrial vehicles operating on prepared surfaces. This second edition updates and replaces the 1992 version and includes expanded rim diameter codes, reflecting advancements in tyre technology and wider industrial applications.
This standard covers pneumatic tyres mounted on 5 degrees tapered or flat base rims, commonly used in industrial environments such as warehouses, loading docks, and manufacturing facilities. ISO 3739-2:2021 focuses on defining the permissible load ratings based on tyre size, inflation pressure, and vehicle operating conditions to ensure safety, reliability, and optimized tyre performance.
Key Topics
- Load Ratings: Defines permissible loads for pneumatic industrial tyres as a percentage of the tyre’s reference load carrying capacity, adapted for various vehicle types (e.g., counterbalanced lift trucks, side loaders) and speed capabilities.
- Reference Load Capacity: Establishes the 100% load capacity of a tyre linked to its load index as described in ISO 3739-1, including specific inflation pressures from 550 kPa to 1,000 kPa.
- Tyre and Rim Compatibility: Applies exclusively to metric series pneumatic tyres mounted on tapered or flat base rims with rim diameter codes ranging from below 20 to 33.
- Operating Inflation Pressure: Stresses the importance of agreeing on cold inflation pressure between tyre and vehicle manufacturers. Inflation pressure affects tyre load capacity and must factor in operating conditions, vehicle characteristics, and tyre placement.
- Dual Tyre Load: Specifies the load distribution when tyres are fitted in dual combinations, doubling the permissible load compared to a single tyre.
Applications
ISO 3739-2:2021 is critical for industrial vehicle manufacturers, tyre suppliers, and fleet operators who require standardized guidance on tyre load capacities to achieve safety and efficiency. Typical applications include:
- Industrial Forklifts and Lift Trucks: Guidance on load capacity ratings for counterbalanced and side-loader lift trucks at various operating speeds.
- Warehouse and Logistics Equipment: Reliable load ratings to prevent tyre failure during heavy load handling and maneuvering on smooth, prepared surfaces.
- Material Handling Vehicles: Ensuring tyre selection matches payload, speed, and usage conditions for optimal vehicle performance and tyre longevity.
- Design and Manufacturing: Assists rim and tyre manufacturers in meeting global standards for pneumatic tyre load capacities to promote interoperability and industry consistency.
Industry professionals use ISO 3739-2:2021 to:
- Select appropriately rated pneumatic tyres for specific vehicles and operating speeds.
- Determine inflation pressures tailored to operational load and service conditions.
- Establish maintenance protocols focused on load adherence to prevent premature tyre wear or safety risks.
Related Standards
ISO 3739-2:2021 is part of the ISO 3739 series addressing industrial tyres and rims, working in conjunction with:
- ISO 3739-1: Designation, dimensions, and marking of pneumatic tyres (metric series) mounted on 5 degrees tapered or flat base rims. This standard provides the essential tyre size and marking specifications related to load ratings.
- ISO 3739-3: Rim contours for pneumatic tyres covered under this series, detailing the rim shapes and dimensions compatible with the tyres.
- ISO 4223-1: Terminology and definitions for pneumatic tyres essential for understanding tyre characteristics and load rating parameters.
- ISO 5053-1: Vocabulary for industrial trucks that helps contextualize vehicle types referenced within load rating tables.
For comprehensive tyre and rim standards compliance, manufacturers, operators, and safety engineers are encouraged to consult the entire ISO 3739 series.
By adhering to ISO 3739-2:2021, industries benefit from standardized load rating guidelines that enhance operational safety, ensure appropriate tyre selection, and extend the service life of pneumatic tyres used on industrial vehicles operating on prepared surfaces. This standard is pivotal for worldwide harmonization of industrial tyre performance and safety criteria.
ISO 3739-2:2021 - Industrial tyres and rims — Part 2: Pneumatic tyres (metric series) on 5 degrees tapered or flat base rims — Load ratings Released:7/15/2021
ISO 3739-2:2021 - Pneumatiques et jantes industriels pour matériel de manutention — Partie 2: Pneumatiques (série millimétrique) montés sur jantes coniques à 5 degrés ou à base plate — Capacités de charge Released:8/4/2021
Frequently Asked Questions
ISO 3739-2:2021 is a standard published by the International Organization for Standardization (ISO). Its full title is "Industrial tyres and rims - Part 2: Pneumatic tyres (metric series) on 5 degrees tapered or flat base rims - Load ratings". This standard covers: This document specifies the load ratings of the metric series of pneumatic tyres primarily intended for industrial vehicles for use on prepared surfaces. ISO 3739-1 deals with designation, dimensions and marking; ISO 3739-3 deals with rim contours for these tyres.
This document specifies the load ratings of the metric series of pneumatic tyres primarily intended for industrial vehicles for use on prepared surfaces. ISO 3739-1 deals with designation, dimensions and marking; ISO 3739-3 deals with rim contours for these tyres.
ISO 3739-2:2021 is classified under the following ICS (International Classification for Standards) categories: 83.160.99 - Other tyres. The ICS classification helps identify the subject area and facilitates finding related standards.
ISO 3739-2:2021 has the following relationships with other standards: It is inter standard links to ISO 3739-2:1992. Understanding these relationships helps ensure you are using the most current and applicable version of the standard.
You can purchase ISO 3739-2:2021 directly from iTeh Standards. The document is available in PDF format and is delivered instantly after payment. Add the standard to your cart and complete the secure checkout process. iTeh Standards is an authorized distributor of ISO standards.
Standards Content (Sample)
INTERNATIONAL ISO
STANDARD 3739-2
Second edition
2021-07
Industrial tyres and rims —
Part 2:
Pneumatic tyres (metric series) on 5
degrees tapered or flat base rims —
Load ratings
Pneumatiques et Jantes industriels pour matériel de manutention —
Partie 2: Pneumatiques (série millimétrique) montés sur jantes
coniques à 5 degrés ou à base plate — Capacités de charge
Reference number
©
ISO 2021
© ISO 2021
All rights reserved. Unless otherwise specified, or required in the context of its implementation, no part of this publication may
be reproduced or utilized otherwise in any form or by any means, electronic or mechanical, including photocopying, or posting
on the internet or an intranet, without prior written permission. Permission can be requested from either ISO at the address
below or ISO’s member body in the country of the requester.
ISO copyright office
CP 401 • Ch. de Blandonnet 8
CH-1214 Vernier, Geneva
Phone: +41 22 749 01 11
Email: copyright@iso.org
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Published in Switzerland
ii © ISO 2021 – All rights reserved
Contents Page
Foreword .iv
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Reference load-carrying capacity . 1
5 Load ratings . 2
5.1 General . 2
5.2 Reference load . 2
5.3 Calculated load . 3
5.4 Dual tyre load . 3
6 Inflation pressures . 3
Foreword
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...
NORME ISO
INTERNATIONALE 3739-2
Deuxième édition
2021-07
Pneumatiques et jantes industriels
pour matériel de manutention —
Partie 2:
Pneumatiques (série millimétrique)
montés sur jantes coniques à 5 degrés
ou à base plate — Capacités de charge
Industrial tyres and rims —
Part 2: Pneumatic tyres (metric series) on 5 degrees tapered or flat
base rims — Load ratings
Numéro de référence
©
ISO 2021
DOCUMENT PROTÉGÉ PAR COPYRIGHT
© ISO 2021
Tous droits réservés. Sauf prescription différente ou nécessité dans le contexte de sa mise en œuvre, aucune partie de cette
publication ne peut être reproduite ni utilisée sous quelque forme que ce soit et par aucun procédé, électronique ou mécanique,
y compris la photocopie, ou la diffusion sur l’internet ou sur un intranet, sans autorisation écrite préalable. Une autorisation peut
être demandée à l’ISO à l’adresse ci-après ou au comité membre de l’ISO dans le pays du demandeur.
ISO copyright office
Case postale 401 • Ch. de Blandonnet 8
CH-1214 Vernier, Genève
Tél.: +41 22 749 01 11
E-mail: copyright@iso.org
Web: www.iso.org
Publié en Suisse
ii © ISO 2021 – Tous droits réservés
Sommaire Page
Avant-propos .iv
1 Domaine d’application . 1
2 Références normatives . 1
3 Termes et définitions . 1
4 Capacité de charge de référence . 1
5 Capacités de charge . 2
5.1 Généralités . 2
5.2 Capacité de charge de référence . 3
5.3 Capacité de charge calculée . 3
5.4 Capacité de charge en jumelé . 3
6 Pressions de gonflage . 3
Avant-propos
L’ISO (Organisation internationale de normalisation) est une fédération mondiale d’organismes
nationaux de normalisation (comités membres de l’ISO). L’élaboration des Normes internationales est
en général confiée aux comités techniques de l’ISO. Chaque comité membre intéressé par une étude
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techniques au commerce (OTC), voir www .iso .org/ avant -propos.
Le présent document a été élaboré par le comité technique ISO/TC 31, Pneus, jantes et valves, sous-
comité SC 7, Pneumatiques et jantes industriels pour matériels de manutention.
Cette deuxième édition annule et remplace la première édition (ISO 3739-2:1992), qui a fait l’objet d’une
révision technique.
Les principales modifications par rapport à l’édition précédente sont les suivantes:
— ajout de codes de diamètres de jantes supérieurs
...
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