Catalog page for the 1982 super galaxy says it used a Suntour Cylone GT Touring read DR, but it also shows that the front DR is a Cyclone. So maybe not the same for a 1983.
Google up some images of the ones they list for the Super Galaxy and Galaxy. Maybe a visual match will also match you up with a website that has some useful info for you.
Someone in the
Classic and Vintage forum might know more. Some of the ones in there with that kind of knowledge might never browse this sub-forum.