Wheel track is measured from the vertical centerline of one tyre to the vertical centerline of the other tyre on the same axle [front wheels are regarded as being on one axle, even if on IFS]

As has been said, your wheels are 13"
1" is 25.4mm.
The measurement from rim to top of tyre would be the tyre sidewall height. The word diameter refers to the size of a circle, like a wheel.

Obviously the rules about mirrors are quite different in Qld.