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Busted Carbon

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Busted Carbon

Old 11-29-10, 06:48 PM
  #51  
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Originally Posted by ericm979 View Post
...
Cervelo R3: BB insert came unbonded
...
I thought this only happened to Trek Madones...
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Old 11-29-10, 06:56 PM
  #52  
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Originally Posted by 2ndGen View Post
I read somewhere in the webesphere that carbon that comes in contact with aluminum corrodes if not properly prepared.
...
Galvanic corrosion. Basically, the interface between the carbon fiber (the actual fiber, not the bulk material) and bare aluminum becomes a little battery when you add a bit of electrolyte (water with dissolved salts of some sort or another) and eats away at the aluminum side. Here's an old thread on the subject.
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Old 11-29-10, 07:10 PM
  #53  
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Originally Posted by Brian Ratliff View Post
Galvanic corrosion. Basically, the interface between the carbon fiber (the actual fiber, not the bulk material) and bare aluminum becomes a little battery when you add a bit of electrolyte (water with dissolved salts of some sort or another) and eats away at the aluminum side. Here's an old thread on the subject.
Thanks.

That's definitely "must know" information.
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Old 11-29-10, 07:18 PM
  #54  
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Uh, uh. I'm staying OUT of this one!

Last edited by ciocc_cat; 11-29-10 at 07:23 PM.
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Old 11-29-10, 07:24 PM
  #55  
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Originally Posted by Brian Ratliff View Post
Galvanic corrosion. Basically, the interface between the carbon fiber (the actual fiber, not the bulk material) and bare aluminum becomes a little battery when you add a bit of electrolyte (water with dissolved salts of some sort or another) and eats away at the aluminum side. Here's an old thread on the subject.
The rider with the corroded aluminum bars had said the same thing, too. He also figured that salt from sweat helped accelerate the process.

DannoXYZ, in post 7 in that thread, mentions the gel coat on carbon that should protect against carbon-Al galvanic corrosion. Hopefully it works that way in the real world, too.
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Old 11-29-10, 07:31 PM
  #56  
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Originally Posted by ciocc_cat View Post
Uh, uh. I'm staying OUT of this one!
oh reallly?
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Old 11-29-10, 07:31 PM
  #57  
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Originally Posted by 2ndGen View Post
who's had their bikes asplode from just normal riding (not racing, not in a crash, etc...)?
When I was 13 years old I did an intentional crash for an 8mm movie we were shooting, and wound up snapping the steel steerer tube on my 1964 Murray beach cruiser (although in fairness this was way before the term "beach cruiser" even existed; afaik they were simply referred to as "bikes"). Does a staged crash still count as a crash? Okay, then when I was in my 30s the aluminum handlebar of my Trek 750 hybrid (which I used exclusively for commuting & had never crashed, intentionally or otherwise) snapped off right at the stem...the classic JRA self-destruction.

OTOH, my carbon bike, which I've owned for over 4 years and have crashed twice, is still perfectly -- or at least acceptably -- intact.
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Old 11-29-10, 07:56 PM
  #58  
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Originally Posted by 2ndGen View Post
How many riders here have had incidents of carbon busting on them?

How many riders here have had incidents of non-carbon bikes busting on them?
I crashed a year ago turning too sharply, and bent the rear triangle on an aluminum frame. I ride my carbon bike ... differently. It's not that I'm more conservative, but I try to take fewer risks on it. Any material can be destroyed if you abuse it right.
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Old 11-29-10, 08:01 PM
  #59  
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Originally Posted by 2ndGen View Post
That brings up an interesting point. Most of that was during crashes.

Ok, edit: Same questions, but just failures from "riding" as it was designed?

In other words, who's had their bikes asplode from just normal riding (not racing, not in a crash, etc...)?
Racing isn't any harder on a bike than non-racing.
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Old 11-29-10, 08:13 PM
  #60  
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Originally Posted by 2ndGen View Post
I read somewhere in the webesphere that carbon that comes in contact with aluminum corrodes if not properly prepared.
Yes. When we designed the original Trek carbon fiber frame (the one that used round tubes bonded to aluminum lugs) we used a fiberglass sleeve between the carbon tube and aluminum lug to prevent electrolytic degradation of the joint.
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Old 11-29-10, 08:17 PM
  #61  
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Originally Posted by Homebrew01 View Post
Racing isn't any harder on a bike than non-racing.
Been a while since you've ridden in the Cat IV peleton, I take it.
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Old 11-29-10, 08:23 PM
  #62  
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I have absolutely nothing good to contribute to this thread.
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Old 11-29-10, 08:26 PM
  #63  
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Originally Posted by ciocc_cat View Post
Uh, uh. I'm staying OUT of this one!
not very well...
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Old 11-29-10, 08:27 PM
  #64  
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I figured by now we would have seen one of the OPs endless streams of page-filling posts. He's conspicuously absent.
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Old 11-29-10, 08:27 PM
  #65  
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Originally Posted by JohnDThompson View Post
Been a while since you've ridden in the Cat IV peleton, I take it.
The actual racing isn't any harder on the bike. As long as you don't crash, it doesn't reall matter. And do I really have to point out that you don't have to race to crash?
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Old 11-29-10, 08:34 PM
  #66  
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you don't have to, but it seems to help.
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Old 11-29-10, 09:25 PM
  #67  
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https://www.trekbikes.com/pdf/carbon_...Care_Flyer.pdf
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Old 11-29-10, 09:34 PM
  #68  
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Originally Posted by Homebrew01 View Post
Racing isn't any harder on a bike than non-racing.
Except for the higher potential for crashing!

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Old 11-29-10, 09:35 PM
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Originally Posted by JohnDThompson View Post
Been a while since you've ridden in the Cat IV peleton, I take it.
+1
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Old 11-29-10, 09:42 PM
  #70  
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Originally Posted by umd View Post
The actual racing isn't any harder on the bike. As long as you don't crash, it doesn't reall matter. And do I really have to point out that you don't have to race to crash?
Yes. That was my point .... guess I needed to spell it out.
btw, good luck with everything, umd

Originally Posted by JohnDThompson View Post
Been a while since you've ridden in the Cat IV peleton, I take it.
I've raced most categories, so I know what racing's like.
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Old 11-29-10, 10:17 PM
  #71  
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Originally Posted by zonatandem View Post


30,000 +miles on this full carbon fiber custom tandem bicycle . . . . . . including Easton c/f handlebars, front and rear; c/f cranks; c/f fork . . .

Have BROKEN 2 steel tandem frames and and one steel tandem fork . . .

So you still ride steel**********

Anything can wear or break eventually.
You're pretty awesome Pops!
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