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

Casting: 60.7 mm tread dia., 51.7 mm i/d., 2.2 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

Suitable for the Gauge 3 Society 2010 minimum tyre width of 6.8 mm, or the earlier standard of 8.0 mm.