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  1. #1
    mlcktmguy
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    Fat Bike Frame Repair?

    I've only been into mtn biking for a couple years. I bought a used Farley 5 about a year ago and it's been very good.
    I was cleaning it after the Sunday ride and noticed a crack in the frame.
    It's not a carbon frame.

    Can these be repaired?

    Fat Bike Frame Repair?-crackedfarleyframe.jpg
    2018 Trek Stache 7
    2016 Trek Superfly 6
    2016 Trek Farley Build

  2. #2
    Life's a ride, enjoy it! Moderator
    Reputation: life behind bars's Avatar
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    Not repairable.
    Wanted, SRAM GX 2x11 rear derailleur

    It ain't supposed to be easy.

  3. #3
    Elitest thrill junkie
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    There are many carbon-fiber repair outfits that can repair that these days.
    "It's only when you stand over it, you know, when you physically stand over the bike, that then you say 'hey, I don't have much stand over height', you know"-T. Ellsworth

    You're turning black metallic.

  4. #4
    Life's a ride, enjoy it! Moderator
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    Quote Originally Posted by Jayem View Post
    There are many carbon-fiber repair outfits that can repair that these days.



    It's an aluminum frame.
    Wanted, SRAM GX 2x11 rear derailleur

    It ain't supposed to be easy.

  5. #5
    mtbr member
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    I would look for a frame to swap parts over...
    I don't know why,... it's just MUSS easier to pedal than the other ones.

  6. #6
    Elitest thrill junkie
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    Quote Originally Posted by life behind bars View Post
    It's an aluminum frame.
    Damn! I read the "its not a carbon frame" as "it's a carbon frame", Doh!
    "It's only when you stand over it, you know, when you physically stand over the bike, that then you say 'hey, I don't have much stand over height', you know"-T. Ellsworth

    You're turning black metallic.

  7. #7
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    Warranty

  8. #8
    mlcktmguy
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    No warranty, I bought the bike used.

    A friend of mine has some clients that are certified welders on all kinds of metals including aluminum. They want to take a look but feel pretty confident they can repair the crack to its original strength or better.

    I've had others tell me that once its cracked you can't trust it even if it's been repaired. Seems like the repair is worth a try, especially in the hands of capable welders used to working with this kind of material.

    Any thoughts?
    2018 Trek Stache 7
    2016 Trek Superfly 6
    2016 Trek Farley Build

  9. #9
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    It won't hold up long repaired. I would still try to get it warrantied, maybe trek will hook you up with a crash replacement for cheap.

  10. #10
    Life's a ride, enjoy it! Moderator
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    Quote Originally Posted by mlcktmguy View Post
    No warranty, I bought the bike used.

    A friend of mine has some clients that are certified welders on all kinds of metals including aluminum. They want to take a look but feel pretty confident they can repair the crack to its original strength or better.

    I've had others tell me that once its cracked you can't trust it even if it's been repaired. Seems like the repair is worth a try, especially in the hands of capable welders used to working with this kind of material.

    Any thoughts?




    As a long time welder and someone that builds the occasional frame, even if welded to repair it would still need to be heat treated to maintain the original level of tensile strength. Try it but never trust it.
    Wanted, SRAM GX 2x11 rear derailleur

    It ain't supposed to be easy.

  11. #11
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    A cracked aluminum bicycle frame is not repairable.

  12. #12
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    Have you called Trek yet? Trek should replace the frame regardless of how many owners it had. A friend of mine got a new frame from Trek after he noticed a crack in an old Gary Fisher frame he bought used.
    Vermonter - bikes, beers and skis.

  13. #13
    mtbr member
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    Quote Originally Posted by VTSession View Post
    ... Trek should replace the frame regardless of how many owners it had...
    They'd be on the hook for a heck of a lot of frames if that were the case.
    Do the math.

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