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  1. #1
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    Help, my crank is falling apart and i want to replace

    Hi all,

    I currently have an 07 Cannondale Synapse 2 (click here for more info).

    Unfortunately the Truvativ triple crank started coming apart at 350 miles. I had it replaced under warranty.

    Guess what? It's falling apart again. This time I want to replace it with an Ultegra double. I know i will have to change the front derailleur since it was a triple before. Do I need any other components? Will my bottom bracket be alright to use?

    Thanks in advance.

  2. #2
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    Ok, so after further research i see that i will need cranks, new BB, new FD, and new BB cups?

    It looks like the 105 shifters are compatible. Can someone confirm my beliefs?

    Shall i just get an Ultegra triple instead, so i dont need a new FD?

  3. #3
    Senior Member
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    Just curious...how does a crank fall apart?

  4. #4
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    ...hmmm.
    Is this like an 'I want a better crank' falling apart?
    Or is it disintegrating? Or did an arm snap?

  5. #5
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    Its loosening off the spindle, the same way it happened last time. It's def. a crank problem though. The inner threads were wearing off last time. Either way, I'm not going to be satisfied till it's gone .
    Last edited by drewmk2; 07-23-08 at 10:39 AM.

  6. #6
    Senior Member
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    Quote Originally Posted by drewmk2 View Post
    Its loosening off the spindle, the same way it happened last time. It's def. a crank problem though.
    Are the insides of the crank hole being rounded out, or is the crank bolt loosening up? Or both?

    Edit: Or is it one of those new-fangled bottom brackets that I have no experience with (and should keep quiet)?

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