6′ 9″ diam., 21 oval spokes, vee inner rim, 4″ apparent tread, 5½″ tyre width.
Hub 20½″ face dia, 2″ out from the tyre, pin between at 14″.

Source: Duchess of Sutherland measured direct at Bressingham, Oct. 1994.

Casting: 67.5 mm tread dia., 60.5 mm i/d, hub 1.6mm out from the tyre at its lowest part, pin at 11.7 mm.

Casting prices and stock . LMS loco sets, price list

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