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Carbon forks, how often do you replace your carbon forks?

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Carbon forks, how often do you replace your carbon forks?

Old 04-13-12, 12:15 PM
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Carbon forks, how often do you replace your carbon forks?

After reading the defective cervelo fork killing cyclist article, I was wondering if forum members typically replace their carbon forks after a set mileage or only when there are noticeable compromises to the structural integrity.

I believe the article mentions 3-4,000 miles as an appropriate mileage range for replacement.
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Old 04-13-12, 12:17 PM
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yes, every 3,000 miles.
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Old 04-13-12, 12:23 PM
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I typically wait and just replace the whole frameset at 5k.
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Old 04-13-12, 12:24 PM
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I love your Doctor Octo album. The original one, I mean.

Originally Posted by KoolKeith
I believe the article mentions 3-4,000 miles as an appropriate mileage range for replacement.
That would be every 9 to 12 months. If your frame is also carbon fiber, there doesn't seem to be a good reason to replace one but not the other. But people don't replace multi-thousand dollar frames yearly for the fun of it. And 99.999999999 % of them don't suffer any ill effects from that. So, if the advice is bunk for frames, it's probably bunk for forks, too.
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Old 04-13-12, 12:25 PM
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Originally Posted by dtrain
I typically wait and just replace the whole frameset at 5k.
my fork is integrated into the frame, so i essentially do the same thing...but its my race frame.
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Old 04-13-12, 12:26 PM
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3-4,000 miles is too often IMO.
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Old 04-13-12, 12:29 PM
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Is this for real?

I have a carbon fork with 5,000 miles on it, and I'm not about to replace it! The fork has showm me absolutely no signs that it should be replaced.

A new fork every 3-4,000 miles? There's no way people are really replacing perfectly good forks with newer perfectly good forks every couple of years. No way.
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Old 04-13-12, 12:31 PM
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Meh, I'm not changing it until it asplodes underneath the fierce pounding of my piston like guads.
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Old 04-13-12, 12:35 PM
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I change my bike every ten years or 100,000 miles.

This thread is silly.
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Old 04-13-12, 12:35 PM
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Right... I replace my fork before I replace my cassette...

Carbon either fails or it doesn't. The forks in question were structurally too weak to deal with all the load conditions; i.e. some load conditions were overlooked during the design of the fork. A rider riding the fork will be fine until they happen upon one of those load conditions. In this case, it appears that the load condition in question is a front impact crash condition. If you have a carbon fork and crash it headlong into something (or highside it as this can produce similar loads on the steerer), you are probably best to take the fork off the bike and look it over very carefully before riding it again.
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Old 04-13-12, 12:39 PM
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I just glue mine back together when it breaks.
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Old 04-13-12, 12:43 PM
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Originally Posted by Homebrew01
I just glue mine back together when it breaks.
That sounds unsafe! You need to wrap some rubberbands around that glue job to make it stronger.


And I just checked my fork, and sure enough, it has a sticker that says "this fork must be replaced before 5,000 miles or you may risk injury or death." I'm not gonna replace it though, because I like the feeling of danger I get from always living on the edge.
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Old 04-13-12, 12:46 PM
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i time it to coincide with the replacement of the fillings in my teeth.
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Old 04-13-12, 12:47 PM
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I'm going to go an check my fork now. Thinking about just preemptively duct taping it so it won't have any future cracks.

Last edited by uncrx2003; 04-14-12 at 12:55 PM.
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Old 04-13-12, 12:52 PM
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If you search the CPSC website, you'll see recalls for defective carbon forks are not that uncommon. Granted it's not a lot compared to the thousands that are manufactured, but I wouldn't want to be one of the few.
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Old 04-13-12, 12:53 PM
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Originally Posted by Homebrew01
I just glue mine back together when it breaks.
I prefer duct tape.
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Old 04-13-12, 01:05 PM
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I wasn't realistically expecting people replacing carbon forks after 3-4000 miles, just wondering if there was a reasonable range without structural compromise that one would do so.

For example, would you log 50,000 miles on a carbon fork without reservation?

I probably wouldn't. As an aside, I wish titanium forks were more prevalent for touring purposes.
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Old 04-13-12, 01:07 PM
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Originally Posted by Seattle Forrest
I love your Doctor Octo album. The original one, I mean.
Great album. I also dig Dr. Dooom, Black Elvis, Sex Style
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Old 04-13-12, 01:10 PM
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Fear mongering
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Old 04-13-12, 01:11 PM
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Originally Posted by KoolKeith
For example, would you log 50,000 miles on a carbon fork without reservation?

I probably wouldn't. As an aside, I wish titanium forks were more prevalent for touring purposes.
What makes you think carbon forks degrade with time. The defective forks that were recalled were defective and at risk of failing from mile 0.
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Old 04-13-12, 01:14 PM
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I have a second hand ultrasound machine that I use to inspect my carbon bicycle after every ride.
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Old 04-13-12, 01:15 PM
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Originally Posted by GiantDefyGuy
That sounds unsafe! You need to wrap some rubberbands around that glue job to make it stronger.
Originally Posted by wrr1020
I prefer duct tape.
OK, Gorilla glue, duct tape, AND rubberbands (velcro might flex less).
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Old 04-13-12, 01:35 PM
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unless it is damaged, carbon fiber will outlast you.
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Old 04-13-12, 01:40 PM
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Originally Posted by Homebrew01
I just glue mine back together when it breaks.
Originally Posted by wrr1020
I prefer duct tape.
Try Gorilla Tape...its the new shiznit on the block.
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Old 04-13-12, 01:47 PM
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I thought the good thing about carbon is that it doesn't fatigue. I don't really plan on replacing my carbon fork any time...uh, ever.

Although frankly I do kind of like the cheap steel fork on my commuter/brevet bike.
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