Information on this site is published as a general technical reference for off-the-road earthmover tyres. It is sourced from manufacturer databooks, the Tire and Rim Association Year Book, Australian Standards (notably AS4457), OEM fitment guidance, and 50 years of independent OTR trading experience.
It is not a substitute for: engineering review of a specific application; current OEM specifications for a specific machine and tyre; manufacturer-provided fitment, mounting, or operating limits; or qualified inspection of a specific tyre at a specific moment in time.
Where this site provides calculations (TKPH, WCF, pressure adjustments, cost models), the calculation methodology is published and the result is illustrative. The user is responsible for confirming the result against current manufacturer data and the actual operating conditions before acting on it.
Technical specifications referenced on this site are drawn from publicly available manufacturer databooks. Where a tyre record cites a Bridgestone, Michelin, Goodyear, Yokohama, Continental, BKT, Aeolus, Techking, Triangle, Double Coin, Galaxy, Alliance, Mitas, MRF, Solideal/Camso, Titan, Trelleborg, Firestone, or other source, that source is the manufacturer's own published material.
TRA service code material is sourced from the Tire and Rim Association Year Book (current edition). AS4457 material is paraphrased from AS4457:2019. OEM fitment guidance is drawn from Caterpillar, Komatsu, Volvo, Liebherr, Hitachi, Bell and Doosan technical documentation.
All trademarks remain the property of their respective owners. Manufacturer names and pattern designations appear on this site for reference and identification only. This site is independent and not endorsed by any tyre manufacturer.
This site collects only what you actively submit through a form (the contact / corrections form, the Knowledge Portal escalation, and any trading enquiry that routes through to Jewell Tyres). We do not run advertising tracking. We do not sell, share, or rent user data.
Basic web analytics (anonymous page views, referrer, country-level location) are collected for the purpose of understanding which references are most used and where they're used. No personal data is associated with this analytics view.
Any data submitted through a form is used to respond to that submission. Data is held by Jewell Tyres Pty Ltd. You can request access, correction or deletion of your data at any time by emailing tyres@jewelltyres.com.au.
This site operates under the Australian Privacy Principles (Privacy Act 1988).
This site is free to use. There is no paywall, no subscription, no membership requirement, no advertising. The intended uses are reference, education, technical look-up, and decision support.
You may quote, link to, and share content from this site. If you publish a piece that draws materially on this site's content, an attribution and link back to otrearthmover.com is appreciated but not required.
You may not republish substantial portions of this site as your own, scrape the site for commercial training of language models or AI agents without permission, or use the site's content in a way that misrepresents independence (e.g. publishing material as manufacturer-aligned content). These are the only restrictions.
This site is operated from Victoria, Australia. Any dispute arising in relation to this site is governed by the laws of Victoria and subject to the non-exclusive jurisdiction of Victorian courts.