Originally Posted by
Iride01
And the bike shop didn't have any more ideas?
Chain wouldn't ordinarily need replacing? You probably need to qualify that more. Is it a new chain, only has a few 100, 1000 or 10,000 miles on it? Regardless, it's so easy just to measure your chain with a steel tape measure and find out for certain. Might take a third hand if you aren't use to doing it.
When I first took the bike to the shop for this problem, I figured it needed a new chain, but they measured and said it wasn't sufficiently worn to call for replacing it. They diagnosed the skipping and decided it needed a derailleur. Got the derailleur, rode it twice at 30-50 mile distances, and came back yesterday saying it's still acting up. The repair guy then adjusted things and suggested it might be ''air in the line'' whatever that is exactly, basically saying it might clear up, try again. Rode right after that, 30 miles, problem is the same if not worse. Problem occurs when going up hills that put me in the smaller chain ring. Which means 90% of the ride is fine, but it's a mess going up hills unless I really slow it down.