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  1. #1
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    damage inside carbon frame head tube

    How bad do you think it is? The scratch is probably screwdriver made (or similar tool). It is 15mm long, 4mm wide, and 0,5mm deep. It is upper head tube hole. The front part. It starts shallow at the top edge of the head tube, and ends around 0,5mm deep after 15mm going down the head tube.

    I was about to assemble a bike out of it but now I am not sure if that is what this frame be used for. It accepts ZS 44 headset cup.


    new picture


    old picture made with potato
    damage inside carbon frame head tube-scratch1.jpg
    Attached Thumbnails Attached Thumbnails damage inside carbon frame head tube-intensetracer275gouge.jpg  

    Last edited by goroncy; 3 Days Ago at 11:35 PM.

  2. #2
    EAT MORE GRIME
    Reputation: 127.0.0.1's Avatar
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    EDIT: with the new pic

    what I say here about jbweld is the ticket.



    mix up some jbweld, smear some over that then wipe it down so the smear is flush (barely any jbweld) and let it harden 24 hours.


    ---
    Last edited by 127.0.0.1; 12-13-2018 at 05:34 PM.
    "Put your seatbelt back on or get out and sit in the middle of that circle of death." - Johnny Scoot

  3. #3
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    I concur with the above. If you hadn't mentioned that it's a little deeper into the carbon as you go, I would think it was a smudge in the carbon grip paste.
    I don't know why,... it's just MUSS easier to pedal than the other ones.

  4. #4
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    I added a better picture.

  5. #5
    EAT MORE GRIME
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    ok we now see the gouge

    definitely jbweld it. mix it long and perfect
    let it harden a wee bit more like silly putty or a bit looser
    jam some in there, scrape it with plastic edge so it's smooth
    let cure 24 hours

    do not use any quick set or clear, use old school gray that takes 24 hours to harden fully.

    or

    have a carbon repair expert do a repair. but the location and depth doesn't look super bad. but I retract what I said. it ain't nothing, it's something minor
    Last edited by 127.0.0.1; 12-14-2018 at 09:41 AM.
    "Put your seatbelt back on or get out and sit in the middle of that circle of death." - Johnny Scoot

  6. #6
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    Quote Originally Posted by 127.0.0.1 View Post
    ok we now see the gouge

    definitely jbweld it. mix it long and perfect
    let it harden a wee bit more like silly putty or a bit looser
    jam some in there, scrape it with plastic edge so it's smooth
    let cure 24 hours

    do not use any quick set or clear, use old school gray that takes 24 hours to harden fully.

    or

    have a carbon repair expert do a repair. but the location and depth doesn't look super bad. but I retract what I said. it ain't nothing, it's something minor
    JB Weld is a company name. If any, which product should I use for this application?

    Sent from my GT-I9505 using Tapatalk

  7. #7
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    Any more opinions would be great. I started warranty process and I am sure that will replace the front triangle. The only reason I am asking how bad is this gouge and should it be repaired is the fact I hate wasting resources and polluting the planet. The bottom line is I want to be safe and I want to be able to put in and in case of problems - take out the headset. This damage looks that way that if I took the headset out in the future, the operation might damage the frame further. I like the idea with fixing it with epoxy but I'd like to hear some more opinions.

    Sent from my GT-I9505 using Tapatalk

  8. #8
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    Looks as though someone used the wrong tool to tap out the headset cup. Used frame? If it was sold to you as a new frame I would return it. Itís probably not a big deal as most of the force at the headtube is at the bottom race/cup but I am no engineer.

  9. #9
    EAT MORE GRIME
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    Quote Originally Posted by goroncy View Post
    JB Weld is a company name. If any, which product should I use for this application?

    Sent from my GT-I9505 using Tapatalk
    jbweld twin tube cold weld original two part epoxy

    it is one of the strongest you can buy and is safe for carbon
    and easy to work with. mix mix mix, let harden enough so it is like runny playdough
    smear push squeeze into the gouge, scrape flat, let harden 24 hours. that gouge won't be able to propagate further


    it would not be used in a larger repair but it is great for that gouge you have
    "Put your seatbelt back on or get out and sit in the middle of that circle of death." - Johnny Scoot

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