7′ 0″ diam., 22 rectangular spokes, rectangular inner rim, apparent tread 4″.
Hub 17¾″ face dia., 2″ out from the hub.

Casting: 70.0 mm tread dia., 63.3 i/d., hub 1.6 mm out from the tyre.

Casting prices and stock . CR loco sets, price list

Scan of a casting in a set for a Caledonian 4-2-2 class 123