Carbon vs. Aluminum vs. Titanium - Video
I realize that this is not the same type of force that a MTB will go through, but still pretty amazing. Anyone have any pics of a Ti frame failing? Aside from welds? On this forum I have seen a number of unusual failures I'd never seen before.
http://video.google.com/videoplay?do...62681682291899 |
completely pointless and irrelevant
a bike frame isnt designed to withstand a crushing force like that. And the "untreated" ti tube means it wasnt butted yet like any finished tube, so it was thicker through out. |
Yeah it's not exactly relevant to the forces involved in cycling, but it was still interesting. I wish he'd tried a chromoly tube as well, just out of curiosity.
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Originally Posted by Frunkin
(Post 5612058)
completely pointless and irrelevant
a bike frame isnt designed to withstand a crushing force like that. And the "untreated" ti tube means it wasnt butted yet like any finished tube, so it was thicker through out. |
Originally Posted by Lamplight
(Post 5612091)
I wish he'd tried a chromoly tube as well, just out of curiosity.
A list of yield strengths (amount of force the metal will take before bending permanently) 6061 Aluminum: 40,000psi 7075 Aluminum: 70,000psi 4130 Chromoly: 60,000psi 6Al-4V Titanium: 125,000psi |
Originally Posted by sixfingeredman
(Post 5611989)
I realize that this is not the same type of force that a MTB will go through, but still pretty amazing. Anyone have any pics of a Ti frame failing? Aside from welds? On this forum I have seen a number of unusual failures I'd never seen before.
http://video.google.com/videoplay?do...62681682291899 Tim |
Next time I buy a bike frame to run over with a truck I'll keep this video in mind.
A bike frame made with tubes that can hold up to that abuse would be overly heavy. I don't see that as a good sales pitch at all for that guy's bikes. He's basically saying "hey look, our bikes are too heavy, but you could run them over with a truck if you wanted to". |
Originally Posted by Chris_F
(Post 5612969)
Next time I buy a bike frame to run over with a truck I'll keep this video in mind.
A bike frame made with tubes that can hold up to that abuse would be overly heavy. I don't see that as a good sales pitch at all for that guy's bikes. He's basically saying "hey look, our bikes are too heavy, but you could run them over with a truck if you wanted to". |
Originally Posted by Kona_stig
(Post 5613449)
As far as I know, titanium is very light.
Biggest problem though, it's expensive! |
Originally Posted by Servo888
(Post 5613539)
Biggest problem though, it's expensive! I have always understood that frames made with TI are 'whippy', that it's not as stiff as aluminum. |
Originally Posted by Kona_stig
(Post 5613449)
As far as I know, titanium is very light.
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Originally Posted by Servo888
(Post 5613539)
It's actually 60% heavier than aluminum but it's also more than twice as strong; so you can build thiner / lighter frames with it. It's also a pain in the butt to work with, but doesn't suffer from fracture cracks like aluminum does (ie you can bend it as you please without loosing to much structural integrity).
Biggest problem though, it's expensive!
Originally Posted by Chris_F
(Post 5613696)
It's the old riddle, what's heavier: a ton of feathers or a ton of lead. Build a bike out of solid titanium (or solid carbon or solid aluminum) and it'll be heavy. A bike made to support the weight of a truck will be heavier than it needs to be to support the weight of a human.
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I just want to try a titanium bike for once.
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