3′ 0″ diam., 9 oval spokes, vee inner rim, 4″ apparent tread, 6″ tyre width.
Hub 9½″ face dia., 1½″ out from the tyre.
Source: Duchess of Sutherland measured direct at Bressingham, Oct 1994.

Casting: 40.46 mm tread dia, 31.7 mm i/d., hub 1.8 mm out from the tyre.
6″ tyre width at this scale = 6.74 mm.

Gauge 3 loco set prices . Casting prices and stock

Scan of a casting in a set for a LMS 4-6-2 Duchess

Suitable for the Gauge 3 Society 2010 minimum tyre width of 6.8 mm, or the earlier standard of 8.0 mm.