enter image description hereGot a new chain, for ten speed rear cassette. Slightly shorter than old chain, but can still reach large sprocket, large cassette ring, although tight. Skipping off small sprocket in front under load. Is there an adjustment possible or do I need a new front sprocket?

  • If the new chain is indeed shorter then you either need a new front sprocket or some maintenance on your rear derailer. Commented Jul 13, 2020 at 17:15
  • How old (mileage) was the previous chain? How's the mileage of the ring? New chain & old rings don't marry well. Check if the teeth have become shark teeth.
    – Carel
    Commented Jul 13, 2020 at 18:07
  • 1
    Post a picture of the front small chainring (what you called a sprocket). A picture from the left side of the bike so the tooth profile is easy to see. See this question for an example: bicycles.stackexchange.com/questions/429/… Commented Jul 13, 2020 at 20:02

1 Answer 1


The small chainring in your picture looks fairly worn - not bad but not good.

I can't see much of the big chainring to make a judgement there.

Here's a silhouette of a sector of new chainring, with this one piece mirrored left-for-right.

enter image description here

Compare this with yours:

enter image description here

The top photo has a definite "up and to the right" look while the flipped second image has a "up and to the left" look. its not a straight-on photo but you get the idea.

As a test, you can try flipping the chainring, but this will mess up the horizontal offset so can't really be ridden like this with indexed gears. If you have friction gears this may work. Also the chainring bolts may not seat very well against the other side - this is only a suggestion to help test the wear of the chainring teeth.

  • This is incredibly helpful. Thank you for taking the time to teach me what to look for. I will investigate flipping it. Thanks again.
    – Ricardo
    Commented Jul 14, 2020 at 22:08

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