4′ 7½″ diam., 14 rectangular spokes, rectangular inner rim, apparent tread 4″.
Hub 14″ face dia., level with the tyre.

Source: works drg.

Casting: 46.25 mm tread dia., 39.9 mm i/d., hub level with the tyre.

Casting prices and stock . GWR loco sets, price list

Scan of a casting in a set for a GWR Dean Single 2-2-2 as built . 4-2-2 rebuild