My bike chain is worn to the 1% gauge on my indicator but only on certain links. I could check a different link and it won't fit at all. However it would drop right through on certain links.

Should I be looking at replacing the chain and rear cassette?

  • How many places, percentage wise, does it "drop right through"? Commented Apr 22, 2015 at 23:48
  • 2
    Uneven wear is a good enough reason to replace the chain. And odds are if the chain is worn so is the cassette. Commented Apr 23, 2015 at 0:34
  • 1
    If you have a master link make sure you are not measuring over it. Sometimes they can add a tiny bit of extra length to the chain so that when the measuring tool spans a master link it can give inaccurate results.
    – Stainy
    Commented Apr 23, 2015 at 13:55

1 Answer 1


I would replace the chain at such condition (if there are 3 or more places or if there are multiple links).
About the cassette it's another question, and if you can't decide yourself, it should be checked in LBS probably.

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service and acknowledge you have read our privacy policy.

Not the answer you're looking for? Browse other questions tagged or ask your own question.