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  1. #1
    Senior Member
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    FD/crankset/chain compatibility on a CX

    I recently had my LBS swap out an LX touring triple (48-36-26) with an Elita Cross double (48-34). Like the new crank, but the bike doesn't shift as well anymore. My current set-up is:

    Elita 10 speed crank
    Shimano HG93 9 speed chain
    Dura Ace bar end shifters w/Pauls Thumbies and
    older LX FD sized for a 48T max big ring

    No matter how I adjust the limiting screws on the FD, the chain is rubbing. Even using the friction shifters, I can't seem to dial it in. Any suggestions?

    Do I need a narrower 10 speed chain? Do I need a road double 10-speed FD? Do I need a new LBS?
    ___________________________
    1998 Trek 7000
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    2007 On One Inbred 29er
    2009 GT Peace 9r Multi

  2. #2
    Soma Lover
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    I eventually went to a road double FD to accomodate the 14-tooth difference. The LBS said it would work and I can't say it didn't. However, if absolutely no rubbing was the object, I only had 6 of 9 cogs on both rings. After making the change, I have 8 of 9 but rarely use the 8th.

    Was your FD originally designed for an 8 speed or a 9 speed drivetrain? If it's an old 8 speed FD, the little bulge in the middle of it was tuned for a 10 tooth jump and will usually work with 12, but 14 sometimes requires a lot of fiddling and still never works quite right.

    Is your chainline set up to match to your derailleur? Is the distance of the seat tube CL (center line) to inner ring CL the same as the seat tube CL to middle ring CL used to be? I'd probably be running the FD very close to the outer chainring too.

  3. #3
    AEO
    AEO is offline
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    are the rings bent?
    Food for thought: if you aren't dead by 2050, you and your entire family will be within a few years from starvation. Now that is a cruel gift to leave for your offspring. ;)
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  4. #4
    Senior Member
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    No, I don't think the rings are bent.

    The chain line may be a good place for me to look. Otherwise, I guess its a new FD?
    ___________________________
    1998 Trek 7000
    2007 Surly Cross Check
    2007 On One Inbred 29er
    2009 GT Peace 9r Multi

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