^^^ I seem to recall a lot of the Schwinn Tandems had the 2-speed hub.
I mounted the shifter on my rat bike on the seat stay. I wanted to keep the handlebars clean with no levers, cables, etc. This is a push-pull Shimano hub with hard wire instead of a cable and spring. Problem: The cable housing has fixed molded-in ends, so is a fixed length. I cut the housing down and found a piece of SS tube with a 4.5mm ID to slide the 2 pieces of housing snugly into and butt together.
