3′ 6″ diam., 10 rectangular spokes, rectangular inner rim, apparent tread 4½″.
Hub 11″ face dia, level with the tyre.

Casting: 35.0 mm tread diam., 27.5 mm i/d., hub level with the tyre.

Casting prices and stock . HR loco sets, price list

Scan of the castings in a set for a HR 4-6-0 Castle