4′ 2″ tread diam., disc, apparent tread 4¾″.
Hub 12¾″ face dia., 1″ out from the tyre.

Casting: 56.2 mm dia., 44.8 mm i/d, hub 1.1 mm out from the tyre.

Gauge 3 loco set prices . Casting prices and stock

Scan of a casting in sets for LNER Gresley A1/A3 .

Suitable for the Gauge 3 Society 2010 minimum tyre width of 6.8 mm, or the earlier standard of 8.0 mm.