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scandium(13 posts)

scandiumby666
Jan 21, 2003 3:41 PM
i just got a bike with easton scandium tubes and carbon seat stays my friend said i made a mistake getting that frame because im 195 lbs and he says im too heavy for the frame, my question is is he right?
re: scandiumThe Human G-Nome
Jan 21, 2003 4:39 PM
the easton scandium tubes do not have a terrible history of breakage. you should be fine. which make did you get?
re: scandiumBrad S
Jan 21, 2003 6:00 PM
If you want 3+ years out of it, then yes, you made a mistake. If you wanted a light as balls climbing bike, and you get a new bike every year or every other year you will probably be fine. Also depends on how aggresive you ride and what type of yearly mileage you put on it. But it is very lightweight aluminum tubeset and will eventually fail with enough stress cycles.
Bollocks!deHonc
Jan 21, 2003 6:43 PM
by666,

Fear not - your bike will be fine - I would place any wager that you will still be riding this bike in 2023 (bar crashing it) if you want to keep it that long. To suggest that it will fall apart after a couple of years is complete rubbish - usually put about by persons who want to believe that they are somehow justified "upgrading " regularly. Not that there is anything wrong with upgrading every few years if thats what you want to do.
Bollocks! I second that!motta
Jan 22, 2003 6:48 AM
Finally! Someone with some sense about this bogus claim of disposable frames. Stress cycles, what a bunch of crap. Anyone who would like to send me their worn out over stressed lightweight frames after a season or two of use, feel free.
Bollocks! I third that!wasabekid
Jan 22, 2003 7:44 AM
and raise you with my e-mail address!!! ;-))

W.
fine, then i fourth that!The Human G-Nome
Jan 22, 2003 8:51 AM
i plan on riding my U2 frame AT LEAST 5 years. i know what is written and what is said. i think it's all crap. if i had the money to bet and there was a place to make this wager, i would throw it down in a second.
Bollocks, and I crackMel Erickson
Jan 22, 2003 8:54 AM
re-crack, double crack, around the corner, up the stairs, in the bed and under the sheets. An Easton scandium frame will far outlast your willingness to ride it.
Agreed x 4 years and countingspeedisgood
Jan 22, 2003 9:37 AM
I with you guys. I have a '99 GT Edge made of 6061 aluminum still going strong on it's fourth year of year round racing/training. And this is including years of winter training in Cleveland where you accumulate layers of salt on your frame during dry rides in the mid and late winter. Of course winter lasts only 8 months a year around here ;-)

Now that I think about it, I've seen Ti and steel bikes crack from fatigue after less than 10 years of use, too. A couple of Litespeeds, a Colnago Bititan, and a Specialized mountain bike. So it can happen to any frame, not just aluminum.

But, just to be careful, I've been working to expand my bike harem over the winter . . .
Basic Metallurgy 101Brad S
Jan 22, 2003 11:07 AM
Well, if you don't ride it much then it probably will last 10 years. But if you are putting upwards of 8,000+ miles on it a year, ride hard and aggresive, then no, I do not think you will get more than 3 years out of a super lightweight, thin walled aluminum frame like a U2 or Easton Scandium or Columbus Starship. Your GT Edge is not lightweight aluminum, pretty thick stuff really. So I am not suprised you got 4 years out of it so far. When I say 3+ years is good, I am talking about the latest crop of superlightweight aluminum tubesets.

I broke a Altec2 bike after 2.5 years at the headtube/downtube junction. Stress fracture. And Altec2 is not nearly as thin walled aluminum tubes as what I mentioned above. Of course I do ride a 61cm frame which definitely makes a difference, but I only weight 165 lbs.

Think what you will, but basic metallurgy 101 says that aluminum frames will even stress fracture if given enough fatigue cycles.
Basic Metallurgy 101motta
Jan 22, 2003 11:19 AM
Sounds to me like your bike broke at the weld. Bad build, not a thinwall tubeset, is the culprit.
Basic Metallurgy 101Brad S
Jan 23, 2003 11:53 AM
Yes, it did break at the weld, and that is where 95% of frames break. It is very rare to see a tube break in the middle of it. Lightweight tubesets are more likely to break at the welds, because the material is much thinner there. Back to Basic Metallurgy 101!
Check out the EFBe...MRS
Jan 22, 2003 2:35 PM
...website for some actual fatigue test results at http://www.efbe.de/erenn.htm
You will see that some of the lightest AL frames (Principia RS6 Pro, Storck Scenario Light, Caad7) have excellent results.