4′ 1″ diam., 12 rectangular spokes, rectangular inner rim, apparent tread 3½″, tyre width 5¼″.
Hub 13″ face dia., 2″ out from the tyre.
Sources: measurements direct from preserved loco No. 1 at NRM, York, June 1995.
The Stirling Singles, Leech and Body, David and Charles (1965): p.52, photo.
Great Northern Locomotive History, RCTS., vol. 2 page 164. (Wheel diameters).
Casting: 38.9 mm tread dia., 33.1 i/d., hub 1.6 mm out from the tyre.
Tyre width for scale modellers: 4.2 mm.
Scan of a casting in a set for a GN 4-2-2
27 Mar 2013