Shimano STI Shifter - Cable Return Problem
My Specialized Allez is about 3 months old and has only a couple hundred miles on it, but those are miles on bumpy Boston city streets. The left shifter, which is a Shimano ST-4500 in the Tiagra groupset, seems to be not returning the cable at all. When I try to shift onto the larger chainring, the shifting lever just stops about halfway through its travel and the derailleur does as well.
The derailleur moves just fine, so it isn't a limit/cable tension issue. I can plainly see the head of the cable being slightly buried in the little window on the side of the shifter, and I understand the head should be plainly visible there.
For now, I've unhooked the cable and just limited out the derailleur so I can ride with the chain on the large ring. Ideally I'd like to fix this problem myself so that I don't have to be without transportation for too long. Does anyone have any experience with this kind of problem?
Thanks so much!