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Durability of carbon frames

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Durability of carbon frames

Old 02-24-11, 02:08 PM
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avidcyclist83
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Durability of carbon frames

I am looking at buying my first carbon frame, but have heard horror stories of them breaking. How big of a crash is needed to total a carbon frame?
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Old 02-24-11, 02:09 PM
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Facepalm.
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Old 02-24-11, 02:10 PM
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Originally Posted by avidcyclist83 View Post
How big of a crash is needed to total a carbon frame?

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Old 02-24-11, 02:12 PM
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Originally Posted by Homebrew01 View Post
This big:

|-----------------------|
I think it's bigger. Closer to this:

I----------------------------------------------I
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Old 02-24-11, 02:15 PM
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Nope, only /-/ big.
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Old 02-24-11, 02:24 PM
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Originally Posted by RacerOne View Post
Nope, only /-/ big.
Liks so: ?

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Old 02-24-11, 02:25 PM
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A local club is the crashingest group of people I've ever seen. Many injuries but no busted CF that I know of.
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Old 02-24-11, 02:26 PM
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At least all the good carbon bikes are made in the US.

Be careful of the ones made in Asia. They will last, on average, five to six rides.
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Old 02-24-11, 02:43 PM
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I hear spontaneous combustion of a CF bike is a bigger concern. I would strap a fire extinguisher on that bike to be safe.
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Old 02-24-11, 02:46 PM
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Its basically just like paper mache, but lighter and way more expensive.
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Old 02-24-11, 02:47 PM
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To give you a serious answer all lightweight bikes can break if you crash them, CF included. That said CF is a lot stronger than many people think, and the odds of breaking your frame in a crash are reasonably low.

I've had 2 crashes in races with my CF bike, and the bike is still fine. I've seen many other people crash Cf bikes without breaking them. And I've seen a few crashes that totaled CF frames, steel frames, and Al frames.

Also, realize that if you do crack a CF frame it's usually repairable.
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Old 02-24-11, 02:56 PM
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Mind you, these guys ride CF frame all the time


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Old 02-24-11, 04:04 PM
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Originally Posted by avidcyclist83 View Post
How big of a crash is needed to total a carbon frame?
How do you quantify crashes? Is there a unit of measurement for impact?
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Old 02-24-11, 04:14 PM
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Having broken carbon and aluminum, I'd say the average carbon frame is more likely to survive a major crash than an aluminum frame.

The aluminum frame sustained a dent in the toptube - handlebar slammed into it during the crash. The dent soon led to a crack, making the frame worthless.

And the carbon cracked at the water bottle bosses, which I would assume are a weak spot. To put that in context though, the carbon water bottle cages, which ripped out the bosses, were just fine.
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Old 02-24-11, 04:17 PM
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Originally Posted by Velo Vol View Post
How do you quantify crashes? Is there a unit of measurement for impact?
(M / t)*{(1 + c)*[(2/M)*(Work)]1/2 - (r/d)*(cs1 + s2)**
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Old 02-24-11, 04:18 PM
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search function is your friend...
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Old 02-24-11, 04:23 PM
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Depends. I've owned two CF bike. One was destroyed when I snapped the headtube off by crashing into a curb. The other is still ticking even though I've probably dumped it on the pavement a dozen times.
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Old 02-24-11, 04:25 PM
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Originally Posted by Velo Vol View Post
How do you quantify crashes? Is there a unit of measurement for impact?
international media coverage on your crash = big crash

walks bike home crying= not so big crash
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Old 02-24-11, 04:26 PM
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Originally Posted by avidcyclist83 View Post
I am looking at buying my first carbon frame, but have heard horror stories of them breaking. How big of a crash is needed to total a carbon frame?
Yes.
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Old 02-24-11, 04:49 PM
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Originally Posted by avidcyclist83 View Post
I am looking at buying my first carbon frame, but have heard horror stories of them breaking. How big of a crash is needed to total a carbon frame?
Big. Unless you're big then small. Or you could just tell your frame it has some loose threads hanging out and it'll snap from embarrassment. You're basically riding a placemat covered in goo. Everything breaks eventually. With the steerer tube acting like a lever it's no wonder the head tube is usually the thing to go. Tip: Don't hit anyone straight on. Bunny-hop them and take the win. GL
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Old 02-24-11, 05:19 PM
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I was on a ride last summer in Colorado when, for no apparent reason, another cyclist's carbon fork broke during the descent of Grand Mesa. Among other woes, he lost his ear.

Many people have great experiences with carbon. I have a hard time getting over that one.

Some more carbon pix:

https://www.bustedcarbon.com/
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Old 02-24-11, 05:25 PM
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Originally Posted by Lanterne Rogue View Post
Among other woes, he lost his ear.
Ugh!
Was he wearing a helmet?
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Old 02-24-11, 05:40 PM
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He was wearing a helmet. People who saw it estimated he was going at least 40 mph when the fork cracked. I heard about it afterward.
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Old 02-24-11, 05:42 PM
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Originally Posted by Lanterne Rogue View Post
I was on a ride last summer in Colorado when, for no apparent reason, another cyclist's carbon fork broke during the descent of Grand Mesa. Among other woes, he lost his ear.

Many people have great experiences with carbon. I have a hard time getting over that one.

Some more carbon pix:

https://www.bustedcarbon.com/
You realize both steel and aluminum forks have been known to break.
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Old 02-24-11, 05:54 PM
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Yep. Everything breaks. Not always this dramatically, though:


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