Suntour cablestopper

You’re bound to run into this problem. You want your gears to run along the bracket, but how do you manage that without lugs on the frame? Here’s the solution for 28.6mm tubes—the size used on old steel frames. From Suntour—they used to make these. And here they are. On the left is a stopper for the front derailleur, and on the right is a guide channel for the cable to the rear.