An independent, free-to-use technical resource for off-the-road tyres in mining, earthmoving, civil construction, ag and industrial.
Search our growing catalogue by size, brand, pattern, TRA service code, machine fitment or compound. Direct links to manufacturer databooks.
/ 02 · ASK THE PORTALPlain-language answers and independent opinion on technical questions. Tyre for a machine. TRA code meaning. TKPH calculations. Mixing rules. With sources.
/ 03 · REFERENCEThe standards reference. TRA service code matrix. Tyre naming systems. Mixing safety rules. Failure mode glossary. AS4457 summary.
/ 04 · CALCULATORSCalculate heat-capacity matching for haul truck tyres. WCF for loaders. Pressure adjustments for altitude. Cost-per-tonne and cost-per-hour models.
/ 05 · MARKET NOTESIn-depth pieces on industry shifts. reported Yokohama-Goodyear consolidation. Tier-one vs mid-tier brand trade-offs. Pilbara supply dynamics.
/ 06 · DAILY INTELLIGENCEA sample briefing format on OTR tyre industry news (illustrative, live feed not yet operational). Manufacturer moves. Regulatory shifts. Supply dynamics. Plus a firehose of source RSS.
The default loader tyre across CAT 980-988, Komatsu WA470-WA500, and equivalents. 25" rim, radial, range of compounds.
/ SIZE · L-5Wheel loader tyre for CAT 994, Komatsu WA1200. 45" rim, radial, heat- and cut-resistant compounds.
/ TRA CODEDeep rock tread for haul truck applications. Tread depth, intended use, machine fitment, and compound considerations.
/ MACHINEWheel loader fitment guide. Standard tyre size 45/65R45. Common patterns, compound options, TKPH considerations.
/ CALCULATORCalculate the Tonne Kilometre Per Hour rating you need for a given haul cycle, then match it to manufacturer TKPH ratings.
/ REFERENCECan you mix radials and bias on the same axle? Across axles? Across positions? The rules from AS4457 and OEM guidance.
OTR Earthmover Tyre is a free technical reference site for off-the-road earthmover and mining tyres, published by Jewell Tyres, an independent Australian OTR tyre trader operating since 1974. It covers 19 tyre brands, TRA service codes, tyre naming, mixing rules under AS4457:2019, a 40-term glossary, common failure modes and a TKPH calculator.
Yes. The site is free, ad-free and needs no login. That covers the Tyre Guide, the TRA service code matrix, the glossary, the failure-mode reference, the AS4457:2019 summary and the TKPH calculator.
Jewell Tyres of Wodonga, Victoria maintains the site, and has traded off-the-road tyres since 1974. No tyre manufacturer sponsors the site or reviews content before it is published. Jewell Tyres trades these tyres commercially, so independent here means independent of every manufacturer, not disinterested.
Start in the Tyre Guide and search on the machine model, which returns the sizes, patterns and TRA service codes commonly fitted to it. In our view the machine search gets you to a shortlist quickly, but the shortlist is a starting point: confirm size, load index, speed symbol and pressure against the current manufacturer databook and the OEM fitment data for your machine before ordering.
No. Specifications here are general reference drawn from published databooks and standards, and may be superseded by a later edition. Everything evaluative is the opinion of an independent trader, not a tyre engineer. Confirm fitment, load, pressure and any safety-critical decision against current manufacturer data, AS4457:2019 and a competent person before acting.
OTR Earthmover Tyre is the public technical reference site maintained by Jewell Tyres, Australia and New Zealand's independent specialist in big tyres since 1974. Free to use, ad-free, and not aligned to any tyre manufacturer. Note that this site is maintained by Jewell Tyres, which trades these tyres commercially, "independent" here means independent of every tyre manufacturer, not disinterested.
Most of what's published about OTR tyres lives in manufacturer databooks, manufacturer-aligned, behind PDF downloads, not searchable, not cross-referenced. We've spent decades collating this material to do our own job. This site is that working knowledge, made available.
This reference site exists to help you make better decisions. When you're ready to buy a specific tyre, sell surplus stock, or source one that's hard to come by, Jewell Tyres trades the inventory.