I cant see them in Reeves, Kennions or Bonds catalogues, which doesnt really help. I assume they are 3.5" gauge, which makes them roughly 6'9" diam. Too small for a single wheeler. They are too big for 2.5" gauge, and look too flimsy for 5". And, four of them? I suspect that Dave may be right. Alan On 19/01/2012 09:54, David Everett wrote: > Harry > > They could be driving wheels for a double framed loco. The wheels go between > the frames and the cranks would be outside the outer frames. Balance weights > would be added as per full size practice - bolted on over the spokes. Just > my thoughts. > > Dave > The Emerald Isle > > MODEL ENGINEERING DISCUSSION LIST. To UNSUBSCRIBE from this list, send a blank email to, modeleng-request@xxxxxxxxxxxxx with the word "unsubscribe" in the subject line.