3′ 2″ diam., 10 oval spokes, rectangular inner rim, 4″ apparent tread.
hub ¾″ out from the tyre.

Source: measured direct at Loughborough in 1995 and GWR works drawing.

Casting: 42.7 mm tread diam., 33.1 mm i/d., hub 0.8 mm out from the tyre.

Casting prices and stock . GWR loco sets, price list

Scans of a casting in a set for GWR 2-6-2T 45xx class.