Columbus integrated headtube- Mtbr.com
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  1. #1
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    Columbus integrated headtube

    I've had one of these knocking around the workshop for a while now and I've finally found a use for it where I don't think it will look like I've welded a table leg into the frame but I'm wondering if anyone has built a frame with one of these and can answer a couple of questions for me

    1) How did you fix the rings in? I'm thinking silver
    2) Distortion, did you need to ream the bearing seats after?
    3) Did you braze the rings in before welding the frame or after? Either way I need to make an adapter for the jig so this doesn't really matter to me

    Cheers,
    Matt

  2. #2
    pvd
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    I wouldn't waste a frame build on one of those. Go with something else.

  3. #3
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    Quote Originally Posted by pvd View Post
    I wouldn't waste a frame build on one of those. Go with something else.
    I know you'll have your reasons for this but would you care to explain? Also, what alternative would you suggest? I'm looking for a clean look for a road frame otherwise I'd use a 44mm like I do for almost everything else

  4. #4
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    Hmm, 2 days and no reply. PVD rarely expands on his opinions.

    I looked at those years ago and Columbus do sound engineering so I figure it would seem a fair item to try. I guess it would not waste much time to silver it up, fit in a lathe to check true-ness and carry on. If it looks bad, nothing really lost but a little time.

    I side-stepped this one due to the newer head sets available and machined my own interpretations of a Head tube on this theme.

    Eric
    If I don't make an attempt, how will I know if it will work?

  5. #5
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    I've been eyeing one of them up for a while too but not sure if I'd have to get a new headset reamer. After welding the TT and DT, I can't image that I wouldn't need to.

  6. #6
    pvd
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    They are just complete trash. You'll end up with a really lame bike using those things after doing backflips during the build and spending money on reamers you probably wont use much after. They are poorly engineered and turn out looking hack.

    Have Loco machine you something nice.

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