3′ 8″ diam., 10 oval spokes, apparent tread 4¾″, tyre thickness 5⅜″.
Hub, 12½″ face dia., ¾″ out from the tyre.
Sources: No 4472 measured direct at Llangollen in Feb. 1995.
O.S. Noch, British Locomotives of the 20th Century, vol 1: page 218. Detailed works drawing.
Casting: 139.7 mm tread dia., 108 mm i/d., hub 2.4 mm out from the tyre. Weight: 2.150 kg.
14 Dec 2021