930 mm (3′ 0.6″) diam., 8 oval spokes, level inner rim. Apparent tread 6″.
Hub 13″ face dia., 10 mm (0.42″) above the tyre.

Sources: Works drawing.

Casting: 29.1 mm tread dia., 19.5 mm i/d,
hub 10.3 mm dia, 0.3 mm out from the tyre.

Casting prices and stock . Netherlands, loco sets, price list

Scan of a casting in a set for a Netherlands NS 6300 class 4-8-4T