I was wondering if anyone could describe (or point me to the direction of a description of) what brifter failure is like.
My buddy has Shimano Ultegra brifters, 8 speed, not sure how old. The rear shifter seems to have failed. Sometimes it doesn't engage at all, other times it feels sticky, but eventually moves the derailer. The problem definitely seems to be in the shifter--doesn't feel like a cable or housing issue.
My understanding is that the shifting mechanism in brifters eventually goes up, but I've never encountered a broken one yet, so I don't know for sure what to look for. Could anything other than out-and-out failure be causing 'sticky shifting?'