... Brown Strictly speaking the Dean "bogies" were trucks; I don't think they had a central pivot. Nothing wrong in principle with a 6' 4" truck; remember Collett produced 7' bogies for much longer vehicles, after experiments with ride. With longer vehicles Dean moved to an 8' 6" truck, then 10' for the longest. I believe the trucks had a reputation for a comfortable ride. Here's a pic of a D15 brake third in 3mm/ft with the 6' 4" truck: 528_180433_210000000.jpg Nigel posted: 18 Dec 2020 11:15 from: a_nummelin Nigel Brown wrote: Strictly speaking the Dean "bogies" were trucks; I don't think they had a central pivot.... Nigel This seems to be a common misconception, as is the commonly used description of them being "centreless". The critical point is that there is no weight carried by the central pivot that fixes the centre of rotation of the bogie. I have heard that the only true centreless bogie may have been that fitted to ...