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Old 01-05-11, 07:21 AM   #1
bumknees
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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).
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Old 01-05-11, 07:43 AM   #2
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Less heat on teh tubes?
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Old 01-05-11, 08:28 AM   #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...
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Old 01-05-11, 01:04 PM   #4
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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
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Old 01-05-11, 06:34 PM   #5
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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.
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Old 01-06-11, 07:31 AM   #6
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Thanks for the explanation!
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