I have the chainring shown below. It's the front sprocket of an ebike. Does this chainring need replacing or are the teeth still OK?

enter image description here

  • One test you can do is to attempt to pull the chain away from the sprocket near the front. If you can pull the chain far enough that it's almost to the top of the closest tooth then either the chain or sprocket (or both) is at end of life. – Daniel R Hicks Oct 14 '18 at 0:25
  • Perfectly OK but rather dirty. – Carel Oct 14 '18 at 18:12

Shows some wear, but looks OK.

All teeth look symmetrical and so do the spaces between them. Really worn teeth look like a swept back shark dorsal fin or develop a visible burr.

Do a Google image search for 'worn chainring teeth' and you'll get plenty of examples.


Although the texture appears to be rusted/worn, the actual chainring itself seems to be okay. As someone said, the teeth are symmetrical as are the spaces in between each one. If this is the case, then you should be all good.

  • Hello, this is a very informative answer. Unfortunately, it doesn't offer any additional information beyond what has already been posted and accepted as an answer. Stack Exchange is designed to accumulate quality, distinct answers, so posting a duplicate answer is contrary to the mission of SE. – Monica Apologists Get Out Oct 18 '18 at 14:16

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service, privacy policy and cookie policy

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