4′ 7½″ diam., 14 oval spokes, rectangular inner rim, apparent tread 4″, tyre thickness 5¾″.
Hub central boss face dia. 14″, 1½″ out from the tyre, pin between at 12″.

Source: No 5553 measured direct at Loughborough in 1995.

Casting: 44.05 mm tread dia., 37.9 mm i/d., hub 1.2 mm out from the tyre, pin at 9.53 mm.

Casting prices and stock . GWR loco sets, price list

Scan of a casting in a set for a GWR 2-6-2T 45xx