Indexing?
I'm sure you already know this but... back in the day, thats how it was done. The stingrays and even the varsities used the friction thing. There was a ''friction'' washer- on the inside and the out side (in board &out board) in the set-up made from a kind of fiber that created ''drag'' and the the tension is regulated by a ''thumb screw'' on the out board end. After you learn how to use them, the real fun is trying to teach someane else how. Oh my god. I usualy say, you have to ''fish'' for the gears and don't bear down while shifting and don't shift wene going up hill and gear down wene you are going to stop (don't park it in a tall gear) And it's--what? do what, when? The Schwinn co. tried to put markings on the shifters, but as soon as the cables stretched a little (and they do) or the shifter got a little out of adjustment, the marks were a joke,then they simply marked north(up) high and down for low, and it was back to ''fishing''.....