1986 Trek 560 Pro. Been doing some upgrades over this year. Installed Shimano 7sp Brifters, and now want to upgrade my RD (has original suntour). There are lots of RD's out there. Long cage, short cage, and many many different Brands.
What will work with my set-up? Any RD's that won't work? My preference would be to find an older Dura Ace or Ultegra.
I appreciate the advice.