TKPH

Tonne kilometre per hour (TKPH) is the measurement of the work load of a tyre and is based on the weight and speed that the tyre can handle without overheating and causing it to deteriorate prematurely. A TKPH rating for a tyre is the theoretical maximum workload it can take (average weight on the tyre * average speed of the truck OR more specifically, tonnes * km/h).

Example: On one axle, the truck has two tyres. The total load on the axle is 100 tonnes when the truck is loaded and 50 tonnes when the truck is empty. The average load on the axle is 75 tonnes which is 37.5 tonnes per tyre. If the average speed of the truck is 20km/h, the tyre rating would need to be 37.5*20 or 750 TKPH in order for TKPH to not be a limiting factor.