Old Down Tube Shifters with no cassette
I found an old road bike in the trash that I've been fixing up. It has friction sun race clamp-on down tube shifters that I would like to keep on the bike. However, the bike does not have a rear wheel. Is there any way to tell what size cassette will work with these shifters or will any number of cogs work...or would I just be better off to buy new shifters?