4′ 6″ diam., 14 rectangular spokes, apparent tread 4″.
Hub 17″ face dia., 2″ out from the tyre.

Casting: 45.0 mm tread dia., 38.5 mm i/d., 1.7 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