Originally Posted by
rjones28
Sometimes that happens because the original assembly lube has degraded and essentially gums up the mechanism. I usually spray some
Clean Streak or similar degreaser into the shifter and then some wet spray lube. Work the shifters a bunch, while in the workstand. That often solves the problem. Assuming that's what the problem is.
Or it's a sign from the cycling gods that now is the time to upgrade your groupset.
