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

Casting: 94.4 mm tread dia., 85.4 i/d., hub 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.