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.
3′ 6½″ diam., 10 oval spokes, vee shaped inner rim, apparent tread 4″.
Hub 13″ face dia., ½″ out from the tyre.
Casting: 24.8 mm tread dia., i/d 20.2 mm., hub 0.3 mm out from the tyre.
Casting prices and stock . LMS loco sets, price list
Scan of a casting in a set for a LMS 2-6-0 4MT
27 Mar 2013