I recently bought a 1983 Schwinn Super Sport. The rear derailluer just broke during my first commute to work. I'm curious what it would cost to replace it. It had a Suntour ARX. The arm just afer the mounting bolt completely snapped off, so most of the actual deralleur is just hanging. I'll try to post pics.
I'm new to road bikes so I need to know, can a modern derailleur be used in it's place? Would any other components have to be upgraded as well then? What should I expect to spend? Thanks for the help in advance.
EDIT: Sorry, I'm not familiar with the terms yet. The shifters are located on the slanted downtube, not on the handlebars.