SAE Interlaboratory Test for Rolling Resistance of Passenger Car Tires - Part I: Data Variation Within and Between Laboratories

An interlaboratory test program was carried out by twelve test facilities with the objective to determine the degree of tire rolling resistance loss variations within and between laboratories. The same tires and test procedures were used throughout. Statistical data analysis involving all data as well as various data subgroups suggest that most of today's tire rolling loss test facilities have obtained an excellent level of performance. All measured and analyzed data are tabulated and displaced for each laboratory.