Originally Posted by HillRider
Sun Tour actually had a fine-tooth ratchet in many of their shifters to balance out the force needed to move the lever in both directions. They were called "Power Shifters" and were the best friction shifters ever made.
The nylon friction washers were difficult to adjust and tended to loosen with time causing "ghost shifting" after a while. I had a set of Campy record DT shifters on my bike for a while and gave up on them because they wouldn't hold their adjustment.
Same here and it was really annoying having to constantly tighten them. Much preferred the Suntour Power shifters.