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  1. #1
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    titanium frames -- riveted vs welded water bottle bosses

    Is there any reason aside from saving time and cutting costs, that a titanium framebuilder would opt to use riveted vs welded water bottle bosses? I've noticed that quite a few "high end" titanium frames appear to have opted for the riveted bosses (Seven, Lynskey, Holland, etc).

  2. #2
    Senior Member mudboy's Avatar
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    Less heat on teh tubes?
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  3. #3
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    Is the heat from welding bosses a serious concern? If I recall correctly, other titanium frames I've seen (Moots, Kish, Spectrum, Dean) use welded bottle bosses. Is this one of those questions where there's no one right answer?

    Having issues with riveted bottle bosses on steel frames in the past, I'm a bit partial to welded ones, but I am not a framebuilder and am pretty much a layperson when it comes to metallurgy...

  4. #4
    Randomhead
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    I'm sure if you asked a builder that does this that they could come up with a plausible reason, but cost seems like the best explanation

  5. #5
    Senior Member ftwelder's Avatar
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    It has to do with causing the least amount of interruption in the tubes mechanical properties. A weld is a bit like a scar. It ravels up the material and pulls toward the weld. a A water bottle boss weld can cause a considerable amount of warp to a tube. Re-tapping Ti bosses is a real drag also. If they served a greater structural purpose, it would be worth it.
    1886 Surrey machinists Invincible, 1900 Nashua, 1937 Raleigh Golden Arrow, 1938 Raleigh Silver Record, 1951 Armstrong tourmalet, 1970 Motobecane Grand Record, 1971 Raleigh Professional, 1971 Gitane TDF, 1972 Legnano Gran Primio, 1973, Peugeot PX-10, 1975 Roberts, 1984 Battaglin Giro, 1985 Grandis Speciale, 2012 FTW

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  6. #6
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    Thanks for the explanation!

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