4′ 1½″ diam., 12 oval spokes, rectangular inner rim, 3″ apparent tread, 6″ tyre width.
Hub 16″ face dia., ¾″ out from the tyre.

Casting: 39.3 mm tread dia., 34.6 i/d, hub 0.6 mm out from the tyre.
Tyre widths for exact scale models at 1:32, 6″ = 4.76 mm.

Scans of a casting in a set for a GWR 4-6-0 King class, 4-6-0 Hawksworth County class