I've got about 3500km on my chain. Yesterday I noticed that the chain was riding up a little bit at the top of the ring on which it was sitting. Taking out a stretch tool, the 0.75 end went in easy, and I was also able to force the 1.0 through the link - time to replace the chain! Fortunately I have a extra new one lying around.
I'm trying to determine if I should swap the rings and/or cassette while I'm at it. The teeth on granny ring are pretty symmetrical while the middle (which I use the most) and the big rings look a little bit funny, though no 'hooks'. Teeth on the small sprocket still have flat tops, but the dip in between them is also a bit lopsided. Should everything but the granny be replaced? I'd rather not spend the money if I don't have to, but if it needs to be done then I'd prefer not wasting a $40 chain to find out. Thanks!
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