New South Wales Consolidated Regulations

HEAVY VEHICLE (MASS, DIMENSION AND LOADING) NATIONAL REGULATION (NSW) - REG 4

4 Meaning of section width of tyre

(1) The section width of a tyre is the tyre's width worked out under subsections (2) to (4).

(2) The tyre width of a radial ply tyre is the number of millimetres marked on the tyre in the position labelled 'section width in mm' in the following diagram--     

(3) The tyre width of a bias-belted tyre is the number of millimetres equal to 25.4 times the number marked on the tyre in the position labelled 'width code in inches' in the following diagram--     

(4) The tyre width for another type of tyre is the width of the part of the tyre that normally comes into contact with the road surface.

(5) In this section--

"bias-belted tyre" means a bias-belted tyre within the meaning of ADR (Definitions and Vehicle Categories).