You are reading a single comment by @andyp and its replies.
Click here to read the full conversation.
andyp-
I should definitely do that anyway, but had a feeling something wasn't right and a quick trip to the LBS confirmed rear mech hanger was slightly bent. Now all sorted, gears reindexed and running smoothly.
In a way kind of relieved that my gear adjusting skills weren't the problem as I was starting to wonder...
Fox
Frozen as in wouldn't turn at all or do you not mean literally frozen?
Mine seem to be turning fine but it's almost like the chain doesn't fit onto them properly, or at least onto the top one. But they used to be fine and KMC chains are meant to be smooth!