3′ 7″ diam., 10 oval spokes, rect rim, apparent tread 4″.
Hub 13½″ face dia., ¼″ out from the tyre.

Casting: 25.1 mm tread dia., 20.4 mm i/d., hub 0.3 mm out from the tyre.
Casting prices and stock . SR loco sets, price list

Scan of a casting in a set for a SR 4-4-0 L1.