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: 30.2 mm tread diam., 23.6 mm i/d., hub 0.6 mm out from the tyre.

Casting prices and stock . GWR loco sets, price list

Scan of a casting in sets for GWR 2-6-0 93xx . GWR 2-8-0 28xx