3′ 2½″ diam. (=3′ 3″ with thicker tread), 8 rectangular spokes, apparent tread 4″.
Hub 12½″ face dia., 1″ out from the tyre.

Source: Sharpe Stewart works drawing.

Casting: 32.1 tread dia., 25.3 i/d., hub 0.8 mm out from the tyre.

Casting prices and stock . HR loco sets, price list

Scan of a casting in sets for a HR 4-6-0 Castle . HR 4-6-0 Jones Goods