Chain Length
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Thread: Chain Length

  1. #1
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    Chain Length

    Was talking chain length the other day and now I have a question...

    If IMG_2718.jpg is two links, why is half link.jpg a half link?
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  2. #2
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    Chain Length

    Pretty sure its to size the chain for a fixed gear bike with horizontal drop outs. The half link gives a smaller increment.


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    Last edited by JeffWarner; 1 Week Ago at 11:53 PM.

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    It's just like so many other things, just doesn't make sense.

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    tlg
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    Quote Originally Posted by JeffWarner View Post
    Pretty sure its to size the chain for a fixed gear bike with horizontal drop outs. The half link gives a smaller increment.
    He wasn't asking what it's for. He's asking why it's called a half link when it's the same size as a 'link'.
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    One link includes both inside and outside plates, a half link goes from inside to outside and takes up half the length of one link. No?

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    tlg
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    Quote Originally Posted by J.R. View Post
    One link includes both inside and outside plates, a half link goes from inside to outside and takes up half the length of one link. No?
    Nope.

    When you buy this box of chain that is labeled as having "120 links" and is standard 1/2" pitch, you get 60 inner links, 60 outer links, for a total of 120 links and it will measure 60" long:


    Another way of thinking about links is that a "link" as a "place where a tooth goes" - thus if a chain wrapped completely around a 44 tooth chainring - it would have 44 links -- with 22 outer-plate-links and 22 inner-plate-links.

    Typically a chain requires an even amount of inner and outer links. This half link.jpg should be called an Odd link. As it allows for an odd number of chain links in a loop.
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    Quote Originally Posted by tlg View Post
    He wasn't asking what it's for. He's asking why it's called a half link when it's the same size as a 'link'.
    And the answer is because that is what it is called. To most people, it's pretty clear what this means despite the potential confusion of halves.

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    Quote Originally Posted by tlg View Post
    Nope.

    When you buy this box of chain that is labeled as having "120 links" and is standard 1/2" pitch, you get 60 inner links, 60 outer links, for a total of 120 links and it will measure 60" long:


    Another way of thinking about links is that a "link" as a "place where a tooth goes" - thus if a chain wrapped completely around a 44 tooth chainring - it would have 44 links -- with 22 outer-plate-links and 22 inner-plate-links.

    Typically a chain requires an even amount of inner and outer links. This half link.jpg should be called an Odd link. As it allows for an odd number of chain links in a loop.
    Unless it's a 1" pitch skip tooth chain.

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