3′ 2″ 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: 30.2 mm tread dia., 22.6 mm i/d., hub 0.6 mm out from the tyre.
Tyre thickness for exact scale modellers: 5⅜″ at 1:32 = 4.3 mm.

Casting prices and stock . LNER loco sets, price list

Scan of a casting in sets for LNER Gresley A1/A3 . Thompson A2/1, 6 wheel tender . Thompson A2/1, 8 wheel tender . P2 . V2