Heat-capacity matching, work capacity factors, pressure adjustments, cost-per-tonne. The math you actually need.
Tonne Kilometre Per Hour for haul truck tyre heat-capacity matching. Enter cycle data, get required TKPH with temperature correction.
Ton Miles Per Hour – imperial equivalent of TKPH for North American manufacturer specifications.
Work Capacity Factor for wheel loaders and dozers. Different math from TKPH, similar purpose: match tyre to duty.
Cold-fill pressure adjustments for altitude, ambient temperature, and load variation.
Lifecycle cost per operating hour for a tyre – purchase, fitment, expected service life, scrap value.
Tyre cost per tonne hauled, with cycle data and expected tyre life. Useful for tier-one vs mid-tier brand comparison.
Cross-reference tyre size to compatible rim widths, including load capacity and valve placement.
These calculators are provided as a general technical reference. Results are illustrative and based on the formulas published in the calculator. They are not a substitute for: (a) current manufacturer specifications for a specific tyre, (b) engineering review of a specific machine and application, (c) qualified inspection by a competent tyre engineer or fitter, or (d) compliance with AS4457:2019 and OEM operating limits. The user is responsible for confirming results against current manufacturer data and the actual operating envelope before acting on the output. Always include manufacturer safety margins.