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Thread: Chain to long?

  1. #1
    ..... Jynx's Avatar
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    Chain to long?

    I am wondering if my chain is to long. This is the bike set up.

    Full Ultegra 10 Speed. Short cage rear derailleur. 53-39 Crank. 12-25 Cassette.

    Big Big Combo



    Big Big Close up



    Small Small Combo



    Small Small Close up



    The thing that concerns me is that the chain looks a little to long in the small small combo like the derailler cant take up enough slack. (I understand you shouldn't ride in the small small) In the Big Big combo it seems like the derailler would be fine with one less link. This leads me to believe I can safely remove a link. It rides fine now but I am wondering if it is the correct length. I can get more pictures if needed. I have to break the chain apart because I am adding in a Connex Link so while I am there...

    is it okay or should I remove a link?

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    Keep on climbing
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    Since you're breaking the chain anyway, I'd just go ahead and re-size the chain using the "large cog / large chainring" method. That's the way I've always done it, and it's never given me problems. See here for details and alternative chain measuring methods: http://www.parktool.com/repair/readhowto.asp?id=26
    "There is more to life than increasing its speed" -- Mahatma Gandhi

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    I use the large chaining/smallest cog or small chaining/largest cog method. In either position, the RD cage should be more of less perpenticular to the ground.

    Nice silver finish, can do wo so MANY logos (Cannondale's fault I know).

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    Senior Member jaxgtr's Avatar
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    I have this same concern only mine is the Compact 50/34 12-25 version of the CAAD9.
    Brian | 2015 Cannondale Synapse Carbon 3 | 2014 Trek CrossRip Comp | 2013 Cannondale SuperSix (for sale)
    Quote Originally Posted by AEO View Post
    you should learn to embrace change, and mock it's failings every step of the way.

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    Senior Member Torchy McFlux's Avatar
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    I'd remove a link if I were you.

  6. #6
    Low car diet JiveTurkey's Avatar
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    Assuming you've got the correct rear derailleur, as long as the big/big combo can reach and the upper pulley doesn't bump into the cog in small/small, then the chain length is fine. You do the big/big sizing method to get the shortest chain possible without precluding the use of the big/big combo. Your chain length appears fine in the pics, but you could probably shorten it.

    Edit: here's the big/big sizing method: http://sheldonbrown.com/derailer-adjustment.html#chain
    Quote Originally Posted by slopvehicle View Post
    Not wearing a helmet makes me more aware of my surroundings. I find myself anticipating the hardness of concrete 50 or 100 feet in front of me, it's almost a zen-like connection between my face and the pavement.

  7. #7
    ..... Jynx's Avatar
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    Quote Originally Posted by jsmithepa View Post
    I use the large chaining/smallest cog or small chaining/largest cog method. In either position, the RD cage should be more of less perpenticular to the ground.

    Nice silver finish, can do wo so MANY logos (Cannondale's fault I know).
    This is the large chainring and smallest cog.



    Quote Originally Posted by JiveTurkey View Post
    Assuming you've got the correct rear derailleur, as long as the big/big combo can reach and the upper pulley doesn't bump into the cog in small/small, then the chain length is fine. You do the big/big sizing method to get the shortest chain possible without precluding the use of the big/big combo. Your chain length appears fine in the pics, but you could probably shorten it.

    Edit: here's the big/big sizing method: http://sheldonbrown.com/derailer-adjustment.html#chain

    Currently there are no problems but I think I will see how it loos when I try the big big method of sizing from sheldon browns site.

    Also I am adding a connex master link. Can I break the chain anywhere and put it on or should I try to find the masterlink used on the current chain?

  8. #8
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    Yup. Take one 1 link.


    Say your chainring diff looks extreme (may require a longer RD). Ppl who know this better advise, am too lazy to go through the gearings.
    Last edited by jsmithepa; 06-08-08 at 11:19 AM.

  9. #9
    Low car diet JiveTurkey's Avatar
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    Quote Originally Posted by Jynx View Post
    Also I am adding a connex master link. Can I break the chain anywhere and put it on or should I try to find the masterlink used on the current chain?
    If it fits, then it'll be fine. The master link will replace a half-inch of chain--an outer section.
    Quote Originally Posted by slopvehicle View Post
    Not wearing a helmet makes me more aware of my surroundings. I find myself anticipating the hardness of concrete 50 or 100 feet in front of me, it's almost a zen-like connection between my face and the pavement.

  10. #10
    ..... Jynx's Avatar
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    I removed a link and a half and then added the masterlink. Here are some new pics.

    Small Small

    Seems better.





    Big Big

    Still acceptable I hope. I went for a ride and everything still rides fine.





    I was on Sheldon's site and he said that as long as there is an obvious bend when it passes through the rear derailler it is fine. And there is definately a bend. It doesn't go straight through.

    Also I used his method of sizing. Big big combo (not through the derailleurs). Then add 1 link. Seems good.

    Thanks for all the help.
    Last edited by Jynx; 06-08-08 at 01:23 PM.

  11. #11
    Senior Member Retro Grouch's Avatar
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    Just looking at the pictures, I'd say that you're pretty close right now. You can't shorten your chain by 1/2 inch, you have to shorten it in full inch increments. Your rear derailleur looks like it might make it but I wouldn't bet on it.

    If it's not rubbing anywhere in the little/little I think that I'd leave well enough alone.

  12. #12
    Low car diet JiveTurkey's Avatar
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    Looks, good, Jynx.
    Quote Originally Posted by slopvehicle View Post
    Not wearing a helmet makes me more aware of my surroundings. I find myself anticipating the hardness of concrete 50 or 100 feet in front of me, it's almost a zen-like connection between my face and the pavement.

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