This recommended practice utilizing empirical data formula describes the procedure for evaluating and predicting off-the-road tire TMPH requirements as determined by work cycle analysis. Loads@ speeds@ inflations and rim configurations are assumed to be within acceptable industry or manufacturers' prescribed recommendations. Other application parameters affecting tires are not included in the scope (flotation@ cut@ bruise@ wear@ etc.) These parameters must also be considered for final tire selection@ since a tire that maximizes desirable TMPH characteristics will normally compromise these other parameters. Standards for the productivity of off-the-road vehicles or tires@ are not included in the scope. The formulae (see paragraphs 1.2-4.3) are applicable to transport type vehicles only (that is@ Trucks@ Tractor Trailers and Scrapers) using Category E Earthmover Service Code Tires. See SAE J751 for service Codes. PURPOSE-Application of the tire TMPH rating value as determined by SAE J1015 test procedure for off-the-road tires.