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My chain doesn't fit my chainring, even though it should according to the specs!

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  • knurt
    commented on 's reply
    the old chain(which is brand new, since I never used it) that came with the bike when I bought it fits perfectly. It is the KMC Z51-chain. It feels a lot weaker than the KMC e101 EPT-chain, so I'll make a post to get peoples suggestions of quality heavy duty chains that works.

  • 73Eldo
    commented on 's reply
    That's how mine looked too. I wasn't thinking it was the narrow wide thing because I'm sure you have tried it multiple times by now so even if you didn't know about the narrow wide one of the times you would have got lucky. I'm not smart enough to know what was wrong I just know it didn't work so I have a new chain on my shelf I won't likely ever use for anything.

  • knurt
    replied
    Hi!

    I am sorry for the photo taken with the wide-narrow gap on the chain, not correctly aligned with the wide-narrow teeths. I have now aligned it correctly, but the problem persists. I'll attach a new photo when the chain is aligned correctly.

    Leave a comment:


  • Dshue
    replied
    Wide tooth narrow gap Click image for larger version

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ID:	123240 Click image for larger version

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ID:	123241

    Leave a comment:


  • Dshue
    replied
    Just as AZguy said, it isn't timed right. If you look at the chain you'll notice the gaps are narrow and wide alternately. If you look at the chainring you'll notice the teeth are narrow and wide alternately. Narrow teeth go in narrow gaps and wide teeth go in wide gaps.

    Leave a comment:


  • AZguy
    replied
    Originally posted by knurt View Post
    Here is a photo.
    Yup - not timed right

    Narrow links go on narrow teeth, wide links go on wide teeth

    Leave a comment:


  • 73Eldo
    commented on 's reply
    I do agree with what NCM says below, in the slightly out of focus photo above it does look like you may be one tooth off. There are narrow and wide teeth so you have to make sure you are starting off correctly with a fat tooth on the wider part of the chain. I would think even if you didn't know that that you have had multiple attempts and one of the times luck would have been on your side and you got it right . That's the way I did it till I realized the teeth were different.

  • 73Eldo
    replied
    I had the same problem with a Whiperman Conex, don't remember the exact model but it did the same as yours on both my well used Lekkie 42 and brand new Luna Eclipse 42. I just went back to a 7/8 speed chain that was on the bike when I bought it used. It seemed to work fine for the previous owner and everything I had thrown at it.

    Mine was a Nexus 3 on a Pugley with a little angle to the chain line so I suspect if the single did work on the ring it may not have been happy. The 7/8 speed is used to flexing a bit and still seems like a reasonably strong chain that seemed to fit both the narrow wide chain rings as well as the 3 different size cogs I had for my Nexus which I think were all genuine Shimano standard looking replacements.

    I would think a mid quality 7/8 (speaking of speeds, not the fraction) chain would take more abuse than the IGH could take. Supposedly the 8's are a lot weaker than the 3 that I had.

    Leave a comment:


  • ncmired
    replied
    Though it may not be the problem, in your photo it looks like the wide/narrow chainring teeth are not timed correctly with the wide/narrow link positions in the chain.

    I use similar parts (Connex 108/1E8 1/8 inch chains) on similar drivetrain bikes, and the chain ring to chain fit is very tight when brand new.

    This photo might help show the timing better:


    Click image for larger version  Name:	image_15995.jpg Views:	0 Size:	158.8 KB ID:	123228

    Last edited by ncmired; 03-05-2021, 09:01 AM.

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  • knurt
    replied
    Here is a photo.

    Leave a comment:


  • knurt
    commented on 's reply
    Sorry, for being unaccurate. Yes it is a single speed chain, because I have an IGH (Shimano nexus 8).

    The chain looks as it fits on 7 tooth in a row, on the chainring, after theese 7 teeths, the chain stays on top of the teeths without engaging them.

  • AZguy
    replied
    That's a single speed chain? What do you mean by doesn't fit? You are using a BBSxx? What do you mean by 7 tooth?

    For best responses provide the most details



    Leave a comment:


  • My chain doesn't fit my chainring, even though it should according to the specs!

    Hi!

    I have bought a Lekkie Bling Ring HD, 42t and a KMC e101 EPT chain. They are both brand new. Before I bought the chain I contacted the support at Lekkie and they confirmed that this chain should fit with the chainring. Unfortunately it doesn't. I have talked with Lekkie about this issue, and they came to the conclusion that this chain and chainring, probably aren't compatible with each other, even though they should be compatible according t the specs. It looks like the chain can fit up to 7 tooth at most. The chain is 1/2" x1/8".

    Which chain should I use instead? I would like a chain that is heavy duty for ebike.
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