Truck and bus tyres. Methods of measuring tyre rolling circumference. Loaded new tyres Ingestion-build-201039 BS 6400 discusses gas meters

BS 6400 discusses gas meters with a maximum capacity not exceeding 6 m3/h

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Truck and bus tyres. Methods of measuring tyre rolling circumference. Loaded new tyres Ingestion-build-201039 BS 6400 discusses gas meters1 Scope This International Standard specifies two methods for measuring the rolling circumference and the number of revolutions per unit distance (kilometre) of new commercial vehicle tyres, under loaded conditions, for use on trucks and buses. The first method is a drum method consisting of loading a test tyre mounted on a free axle against a driven road wheel (or drum) of specified diameter. The second method involves a vehicle whose drive axle is