6′ 8½″ diam., 22 oval spokes, rectangular inner rim, 4¼″ apparent tread.
Hub 17″ face dia., 3″ out from the tyre, pin in line at 13″.

Sources: O.S. Nock, British Locomotives of the 20th Century, vol. 1, page 155. Reduced works drg. of Star class.

Casting: 63.9 mm tread dia., 57.1 mm i/d., hub 2.4 mm out from the tyre, pin at 10.3 mm.

Casting prices and stock . GWR loco sets, price list

Scan of the castings in sets for a GWR 4-6-2 Great Bear . 4-6-0 Star . 4-4-2 North Star