Carbon vs. Aluminum vs. Titanium - Video
11-10-07, 09:34 PM
#1
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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.
https://video.google.com/videoplay?do...62681682291899
https://video.google.com/videoplay?do...62681682291899
Last edited by sixfingeredman; 11-10-07 at 09:35 PM. Reason: bad link
11-10-07, 09:51 PM
#2
nom nom nom
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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.
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.
11-10-07, 10:00 PM
#3
Senior Member
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.
11-11-07, 12:05 AM
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11-11-07, 02:47 AM
#5
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Chromoly is quite a bit weaker.
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
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
11-11-07, 03:36 AM
#6
Senior Member
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.
https://video.google.com/videoplay?do...62681682291899
https://video.google.com/videoplay?do...62681682291899
Tim
11-11-07, 05:27 AM
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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".
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".
11-11-07, 09:30 AM
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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".
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".
11-11-07, 09:53 AM
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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!
Biggest problem though, it's expensive!
11-11-07, 10:07 AM
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use your best eye
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Not a problem for many riders.
I have always understood that frames made with TI are 'whippy', that it's not as stiff as aluminum.
I have always understood that frames made with TI are 'whippy', that it's not as stiff as aluminum.
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"I tell you, We are here on earth to fart around, and don't let anybody tell you any different." - Kurt Vonnegut jr.
"I tell you, We are here on earth to fart around, and don't let anybody tell you any different." - Kurt Vonnegut jr.
11-11-07, 10:29 AM
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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.
11-11-07, 10:34 AM
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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!
Biggest problem though, it's expensive!
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.
11-11-07, 12:31 PM
#13
Bike ≠ Car ≠ Ped.
I just want to try a titanium bike for once.
