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  1. #1
    Addicted to 2 wheels
    Reputation: SugarHigh's Avatar
    Join Date
    Dec 2011

    Aluminum HT - Cracked at post - Advice

    I have an aluminum frame hardtail. I just noticed a substantial crackon the frame where the post goes in, above the joint. See pics attached.

    I could not visually see any other cracks. I did change to a KS seat dropped a month or so ago.

    Should I stop riding it?

    Should I weld it?

    Should I throw it away?
    Attached Thumbnails Attached Thumbnails Aluminum HT - Cracked at post - Advice-farme-post-crack-2-thin.jpg  

    Aluminum HT - Cracked at post - Advice-frame-post-crack-1-thin.jpg  

  2. #2
    mtbr member
    Join Date
    Jun 2008
    How far down does your seatpost reach? Looks like not far enough...
    Weld it or throw it away!

  3. #3
    mtbr member
    Join Date
    Oct 2012
    your stuck between a rock and hard spot.
    If you weld you weaken the surrounding metal, if not your screwed.
    If you could keep that surrounding aluminum cold while its welded you may be ok, but your options are those two, weld or throw away.

  4. #4
    Eric the Red
    Reputation: edoz's Avatar
    Join Date
    Jan 2004
    What kind of frame is it? It is a pita to fix that, and will run the risk of never being right. It might need to be heat treated again, and you're not really solving the problem that led to the failure in the first place.

    I'd scrap it.

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