BS AU 50.1.1.2:2001 pdf free.Passenger car tyres-Methods for measuring rolling circumference-Loaded new tyres. BS AU 50.1.1.2 1 Scope This International Standard specifies two methods for measuring, under loaded conditions, the roling circumference and revolutions per unit distance (kilometres) of new tyres for use on passenger cars. The first is a drum method that consists of loading a test tyre mounted...