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  1. #1
    RacingBear UmneyDurak's Avatar
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    Frame question: is this normal

    So I was cleaning my bike today, bought it last month, and noticed a whole on the none drive side of the rear triangle. Is this normal, and what is it for? This is a 2007 CAAD8 frame.
    Picture:


    Thanks.
    I see hills.... Bring them on!!!
    Stay calm and bring a towel.

  2. #2
    You know you want to. Eatadonut's Avatar
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    Worms. Check the other side - if there's no hole, don't eat it.


    Just kidding. Looks like drainage/venting. I wouldn't worry about it.
    Weather today: Hot. Humid. Potholes.

  3. #3
    Senior Member teamcompi's Avatar
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    I think you were right the first time, looks like a worm hole to me!

  4. #4
    RacingBear UmneyDurak's Avatar
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    I don't think I had that whole on my two other bikes, one of the was with 2006 CAAD8. Not really worried, well maybe a little, but very curious what it's for.
    I see hills.... Bring them on!!!
    Stay calm and bring a towel.

  5. #5
    The mods changed this... damocles1's Avatar
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    Drain hole. My old CAAD7 had one...

  6. #6
    You know you want to. Eatadonut's Avatar
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    Quote Originally Posted by UmneyDurak
    I don't think I had that whole on my two other bikes, one of the was with 2006 CAAD8. Not really worried, well maybe a little, but very curious what it's for.
    Either for water drainage, or vapor escape for welding purposes.
    Weather today: Hot. Humid. Potholes.

  7. #7
    RacingBear UmneyDurak's Avatar
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    Yep, you guys were right. This is a vent hole for welding.
    Last edited by UmneyDurak; 02-14-07 at 12:46 PM.
    I see hills.... Bring them on!!!
    Stay calm and bring a towel.

  8. #8
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    Quote Originally Posted by UmneyDurak
    Yep, you guys were right. This is a vent whole for welding.
    Ok, sorry to be a grammar/vocabulary Nazi, but it's a "hole", not a "whole".

    Rant over.

  9. #9
    You know you want to. Eatadonut's Avatar
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    Quote Originally Posted by JackTheLadd
    Ok, sorry to be a grammar/vocabulary Nazi, but it's a "hole", not a "whole".

    Rant over.
    well it is a whole hole - otherwise this thread would have been titled "dented frame - is it safe?"
    Weather today: Hot. Humid. Potholes.

  10. #10
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    But why is the paint scraped off?

    Bob

  11. #11
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    Is the hole tapped? Maybe for a kickstand? Did you get the bike at Wal-Mart?

    Just kidding.

  12. #12
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    Quote Originally Posted by Eatadonut
    "dented frame - is it safe?"
    IS IT SAFE????
    Attached Images Attached Images

  13. #13
    Year-round cyclist
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    Where is it. Is it inside the left chain stay?

    I assume the bike has vertical dropouts (I can't see from the web picture), and therefore that the wheel hasn't been mis-aligned. However if the wheel is badly out of true or if you broke a spoke and had some tire rub or if you installed a too large tire, then the tire may have rubbed on the chain stay.

    Is it safe? I think you would need to compare with a new frame to see what is the shape of a normal left chainstay. The photo doesn't tell us if you just rubbed a bit of paint or if you removed a real amount of material. And even if there is little material removed, the tube might have been flattened and ovalized; comparing it to a brand new one would tell you whether or not that's the case.

    As for the hole, check first to see if the metal is thick – and therefore it is a genuine hole – or if feels like metal thinned until there is nothing left. Another sure sign would be to check whether you have one on the right side and if a new frame has it.
    Now a new frame might have a painted-on hole, so if you see or feel (with your hand) a dimple around that place, you might well have a brazing vent hole that was plugged and painted over.

    BTW, I'm NOT giving out a diagnostic at a distance. If you have a good bike shop, they might be able to assess the situation.
    Michel Gagnon
    Montréal (Québec, Canada)

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