4′ 1½″ diam., 12 oval spokes, rectangular inner rim, 3″ apparent tread, 6″ tyre width.
Hub 16″ face dia., ¾″ out from the tyre.

Casting: 41.25 mm tread dia., 36.2 i/d, hub 0.6 mm out from the tyre.

Casting prices and stock . GWR loco sets, price list

Scans of a casting in a set for GWR 4-6-0 King