This example shows a tyre width of 3.5 mm for Gauge 0 Fine.
For Scale7 remove more metal from the back of the wheel to give a tyre thickness of 3.2 mm instead of 3.5 mm.
5′ 0″ diam., 15 oval spokes, vee shaped inner rim, apparent tread 4¼″
Hub face dias: B117, driven 18″, B118, coupled 16″; level with the tyre. Pin between at 14″.
Source: measured direct from a preserved loco at Butterley in 1995.
Castings: 35.0 mm tread diam., 29.9 mm i/d., hub level with the tyre, pin at 8.2 mm.
Casting prices and stock . BR loco sets, price list
Scan of the castings in a set for a BR 2-10-0 9F
1 Jan 2018