Originally Posted by
FBinNY
What would help most is knowing how long it's been a problem, and what changes, if any, were made before it started.
For example; if this is a new chain on a very old chainring (doesn't look that way) then that would point to some possibilities.
One diagnostic that you might try. Remove the front derailleur, (or slip the chain put and let the FD swing as far inboard as possible so it's out of the way), and manually shift the chain back and forth with your fingers and see if it settles nicely. If finger shifting works, then you know it's simply a FD adjustment issue.
BTW- something about the photo bugs me. Please measure a 12" (24 links) length of chain with a ruler. Tell us how far beyond the 12" mark the 25th pin is (should line up exactly like the first, but will be farther out on a worn chain.
Hey thanks for the tips. It's all the original stuff and nothing new has changed. The bike is 5 years old or so. It just started doing that seemingly out of the blue.
I tried the manual finger test to shift and I discovered that the chain will 9 out of 10 times ride high like the picture.
When measuring 12 inches of the chain, I found the links to be about a 16th/inch longer. Would that cause it?
Thanks!