This International Standard specifies the method for measuring rolling circumference and revolutions per unit distance (kilometre) for new tyres, under loaded conditions, made for use on trucks and buses. The values thus obtained are not intended for use as levels of performance or quality.
This International Standard applies to all truck and bus tyres.
SIS SS-ISO 9112:1992 history
1992SIS SS-ISO 9112:1992 Truck and bus tyres — Method of measuring tyre rolling circumference — Loaded new tyres