Passenger car, truck and bus tyres. Methods of measuring rolling resistance. Single point test and correlation of measurement results
Passenger car, truck and bus tyres. Methods of measuring rolling resistance. Single point test and correlation of measurement results
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1 Scope This International Standard specifies methods for measuring rolling resistance , under controlled laboratory conditions, for new pneumatic tyres designed primarily for use on passenger cars, trucks and buses. Tyres intended for temporary use only are not included in this International Standard. This International Standard includes a method for correlating measurement results to allow inter-laboratory comparisons. Measurement of tyres using this method enables comparisons to be made between the rolling resistance of new test tyres when they are free-rolling straight ahead, in a position perpendicular to the drum outer surface, and in steady-state conditions. In measuring tyre rolling resistance , it is necessary to measure small forces in the presence of much larger forces. It is, therefore, essential that equipment and instrumentation of appropriate accuracy be used.
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