A method has been developed using a two‐wheeled trailer to obtain accelerated wear data on tires. The method is much quicker than conventional testing, and the results on a test car show good agreement with trailer results. The rate of wear can usually be established to within 5 percent so that small differences between compounds are readily detected. Tests on multi‐section tires have been carried out but are not found to be a satisfactory way of increasing reliability. Results are normally presented in the form of a wear rating relative to a control compound, and the data shows that reversals in ranking occur as the conditions of test are changed to cause variations in the tire surface temperature.

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