Hairline cracks or fractures
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  1. #1
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    Hairline cracks or fractures

    What would you do with hairline cracks or fractures like these?
    Attached Images Attached Images

  2. #2
    RoadBikeReview Member
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    If no crash is involved, contact the frame maker. Actually, contact them even if it was in a crash. Seems to be a defective/failing seam to me.

  3. #3
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    Sound advice if a new frame that your building, take back to shop or send to manufacturer see if it is anything more dubious. If out of warranty find a carbon repair place and get them to take a proper look, from the pics it could be carbon failure through to just paint cracking. They should be able to check via some NDT.

  4. #4
    Frog Whisperer
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    I would worry about that.
    Of course I'm sure...that doesn't mean I'm right.....

    "There's no sense being stupid unless you show it."

  5. #5
    Cleavage Of The Tetons
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    There is stress in their stress relief.
    Is your seatpost long enough?

  6. #6
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    Quote Originally Posted by ridesmasterx View Post
    What would you do with hairline cracks or fractures like these?
    This doesn't look good, though it could just be paint cracks. I would mark the end of the visible crack with a "dot" from an indelible marker or fingernail polish. If the "crack" progresses beyond the dot, I would be much more worried. Not likely to turn into a catastrophic failure but you can monitor its progression (if any) and decide what to do from there.

  7. #7
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    I'd get this thing warrantied asap while it's still winter. Last thing I want to do is wait until warmer weather and then send it in for warranty and having to wait weeks to get the bike up and running again

  8. #8
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    Yes it is, it goes in at least 6-7”

  9. #9
    Banned Sock Puppet
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    Quote Originally Posted by ridesmasterx View Post
    What would you do with hairline cracks or fractures like these?
    I don't know about you, but I'd cry.
    "If someone needs 200 rolls of toilet paper for a 14-day quarantine, they probably should have made a doctor's appointment way before the COVID-19 outbreak." -- Unknown

    "With
    bicycles in particular, you need to separate between what's merely true and what's important."
    -- DCGriz, RBR.




  10. #10
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    All clear!! I had just sold this bike and the new owner removed the seat clamp and discovered the two hairline “cracks” which actually weren’t. He took the bike to a carbon fiber repair shop in MA. and they said it was just in the paint and not into the carbon fiber 👍👍

  11. #11
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    Quote Originally Posted by ridesmasterx View Post
    All clear!! I had just sold this bike and the new owner removed the seat clamp and discovered the two hairline “cracks” which actually weren’t. He took the bike to a carbon fiber repair shop in MA. and they said it was just in the paint and not into the carbon fiber 
    Lucky for both of you.
    "If someone needs 200 rolls of toilet paper for a 14-day quarantine, they probably should have made a doctor's appointment way before the COVID-19 outbreak." -- Unknown

    "With
    bicycles in particular, you need to separate between what's merely true and what's important."
    -- DCGriz, RBR.




  12. #12
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    Quote Originally Posted by ridesmasterx View Post
    All clear!! I had just sold this bike and the new owner removed the seat clamp and discovered the two hairline “cracks” which actually weren’t. He took the bike to a carbon fiber repair shop in MA. and they said it was just in the paint and not into the carbon fiber
    What was the name and location of the shop? I have a similar question.


    Sent from my iPhone using Tapatalk

  13. #13
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    Quote Originally Posted by TiCoyote View Post
    What was the name and location of the shop? I have a similar question.
    Suddenly the thread goes silent.

  14. #14
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    I found this crack after 3 years, in 2017. So I kept the images to see if it got any worse.

    No change since! Just the paint.

    crop.jpg

  15. #15
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    it looks to me like the line in the first 2 pics is just from the seat clamp at the point where the two ends come close but leave a gap and is no big deal.

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