ISO 9112:2008
Truck and bus tyres -- Methods of measuring tyre rolling circumference -- Loaded new tyres
Product Details
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 equipped with the test tyres driven on a straight, paved road. The values thus obtained are not intended for use as levels of performance or quality.
ISO 9112:2008 applies to all truck and bus tyres.