A full set consists of 4 x X35 leading, 6 x X37 driving, 2 x X36 trailing and 6 x X38 tender wheels.

Dimensions measured from No 6233 at Bressingham in 1994
(and also from the works drawing of the trailing wheel since not much of it is visible in the prototype.)

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

Measured tyre widths for exact scale models at 22.6:1, 6″ = 6.74 mm.

The prototype driving wheel weights are surface mounted plates and are not cast in.