Friction shifters and new cogsets (9 or 10 speed)?
I've got some old Suntour barend friction shifters I'd like to use on a build, but I want to use a newer 9 or 10 speed cogset if possible. Will friction shifters work with any RD and cogset, or do I have to buy a particular RD for use with friction shifters? Will an old Suntour RD work with a newer cogset -- or do I need a newer RD for the newer cogset?
That's a lot of tiny questions - basically I'd like to understand how everything works together as far compatibility -- if my shifters are the friction type, does it matter how many cogs and what kind of RD I have?