1978-02-01

Interlaboratory Tests for Tire Rolling Resistance 780636

A co-operative test program was initiated among various tire manufacturers and test facilities in order to measure passenger car tire rolling resistance with existing equipment. The results of these tests showed considerable scatter. After suitable corrections were made for test drum size, for transducer geometry and for ambient temperature, the data clustered much more closely about a single mean value. It is concluded that rolling resistance measurements using different test drum diameters and different transducer elements can be used to obtain consistent rolling resistance data provided that proper correction factors are introduced.

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