4′ 7½″ diam., 14 oval spokes, rectangular inner rim, 3½″ apparent tread.
Hub 15″ face dia., pin between at 10″, hub 2½″ out from the tyre.

Source: No 7754, made by North British Loco Co in 1935, measured direct at Llangollen in February 1995.

Casting: 46.25 mm tread dia., 40.2 i/d., hub 2.2 mm out from the tyre, pin at 8.33 mm.

Casting prices and stock . GWR loco sets, price list

More information and prototype photo.