I'm just starting to think ahead a bit and don't know yet if I'm going to be looking for one of these but I'm starting to think I might want one so for now I'm just looking for info ... (ramble off)
How well do the old 3 pulley derailleurs work compared to more normal 2 pulley long cage derailleurs?
I found this image of an example:
Are they worth the hassle? Do they work? What problems or concerns are there with using them?
I'd like to build up a loaded touring long distance hill grinder (wide gear range) bike and am starting to think ahead about specific components to use and I just like the general unique and funky look of the 3-wheel derailleur.
Per a discussion I came across on velospace there seems to be a couple of brands or models of these 3-pulley setups so which would I probably be better off with and which should I maybe avoid?
Thanks for any input. I've got no budget to play with right now so now is probably a good time for my research so I won't have any spontaneous temptations before I know what to look for.
Edit to add link to the velospace discussion: