for LNWR Crampton (2+2)-2-0 'Courier' at 1:22.6, 17/32″: 1 foot for Gauge 3.
A full set consists of 4 x X290 carrying wheels, 2 x X303 drivers and 6 x X125 tender wheels.
Sources: drawings by M. Sharman (M. Sharman, The Crampton Locomotive, 1983.)
Suitable for the Gauge 3 Society 2010 recommended minimum tyre width of 6.8 mm, or the earlier standard of 8.0 mm.
Links: Home. Casting prices and stock: X125, X290, X303. Wheel data: X125, X290, X303. Gauge 3 loco sets price list.
Full size for 103 dpi screens. Bare weight c. 1,590 gr.