Originally Posted by
Unicornz0
Thanks HillRider, since I am currently unable to find the original rear derailleur, which do you suggest and why?
Sun Tour (the original company) is out of business and has been for many years.
Any Shimano rear deraileur should be a good replacement. At a reasonable price point, consider either a Tiagra (road) or Deore LX (MTB). Both will work well and the LX will give you more gearing options as it will clear up to a 34T rear cog.