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  1. #1
    txn
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    NDS crank arm keeps coming loose

    Ultegra 6500 crankset (Octalink). Iíve been having issues with the NDS bolt backing out as I ride. Iíve retightened and torqued to spec many times. Also, itís done this with two different bottom brackets. Any suggestions on what to do next?


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  2. #2
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    Buy a new nds crank arm or a new crankset. Your crank arm is toast.

    Quick fleabay search results in about $30 for used set.

  3. #3
    'brifter' is a lame word.
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    ^This^. If it won't stay tight it's done. Replace it. It was most likely installed by someone that didn't know how to do it by feel properly and was too lazy to remove the cap and confirm it visually.
    I work for some bike racers
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  4. #4
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    Quote Originally Posted by cxwrench View Post
    ^This^. If it won't stay tight it's done. Replace it. It was most likely installed by someone that didn't know how to do it by feel properly and was too lazy to remove the cap and confirm it visually.
    Most likely. It should be really easy to see the damage to the splines. If it is not damaged, then thread locker might be the answer, though it shouldn't have to be the answer.

  5. #5
    Russian Troll Farmer
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    If you resort to using threadlock, make sure it's a mild version. Some threadlock formulas require a torch to remove.
    "L'enfer, c'est les autres"

  6. #6
    'brifter' is a lame word.
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    Quote Originally Posted by No Time Toulouse View Post
    If you resort to using threadlock, make sure it's a mild version. Some threadlock formulas require a torch to remove.
    Like the one that whoever builds hubs/freehubs for Vision uses? The stupid ass freehub that is failing on probably half of the OEM Metron 40 LTD wheels that requires a torch and a 12mm allen? That threadlock?
    I work for some bike racers
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  7. #7
    txn
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    Thanks for all the replies. Looks like Iíll throw some thread lock on there and start looking for a replacement crankset


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