Originally Posted by
JohnDThompson
SunTour was odd in putting barrel adjuster on their rear derailleurs long before they became necessary with indexed shifting. Even the old "GT" from the 1970s had a barrel adjuster:
But they didn't appear on all their derailleurs, for reasons that are lost to history.
Agreed. I had a V-Luxe with a barrel adjuster on a Lejeune at one time. I was able to index it with a GPX shifter on an ulta 6.