Will an old 6 speed Deore rear derailleur and crankset work with a 9 speed cassette.
I'm in the process of converting my 80s Rockhopper's components and throwing an xtracycle on it. I have a set of 9 speed wheelset/cassette/chain that I intend on using. I will continue to shift with a friction barcon shifter. Will my old 6 speed derailleur and crankset work or will I have problems with the chain dropping in between the chainwheels and a potential for some sort of rear derailleur pulley disaster? My understanding is the cage is wider to accommodate a 6 speed chain and going with a thinner 9 speed chain will give a lot of travel and potential for some sort of lock up?? thoughts?