This example shows a tyre width of 3.5 mm for Gauge 0 Fine.
For other standards remove more or less metal from the back of the wheel to give your chosen tyre width.
3′ 6″ diam., 10 oval spokes, almost flat inner rim. Apparent tread 4.9″.
Hub 12¾″ face dia., level with the tyre.
Sources: Sharp, Stewart works drawings, photographs.
Casting: 23.7 mm tread dia., 18.2 mm i/d, hub 8.5 mm dia, ½″ out from the tyre.
Casting prices and stock . Netherlands, loco sets, price list
Scan of a casting in a set for a Netherlands HSM 700/NS 5500 class 4-4-2T
8 Sept 2017