Originally Posted by Duragrouch

Yeah, that additional pivot, near the mount, the opposite side of the linkage from the cage, that appears to a sprung joint and not simply adjustable. When someone mentioned a "clutched" RD, I had thought that was it, but now know (I think you pointed out?), any clutch would be in the top cage pivot. It all makes sense. My $13 Tourney TX GS is still working great and offers adequate clearance, but if I ever tour and need lower than 21 gear inches, that should offer a perfect solution to go up to 40 or 42 low cog. (Again, because my bike is a tough fit for chainline on a triple crank, because combination of fat seat tube and FD adaptor, prevents the FD cage from going in far enough for a triple, with a good chainline).