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Are these carbon bars safe to use?

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Are these carbon bars safe to use?

Old 12-09-13, 02:33 AM
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Chrise510
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Are these carbon bars safe to use?

https://imgur.com/a/JOkam
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Old 12-09-13, 03:14 AM
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Probably. Tap it with a coin and see if it sounds "dead". That thick grippy stuff they put on at the stem sometimes bunches up into creases like that, but it's going to be up to you or a bike shop that can see it in person to make 100% sure. Those awful photos (I assume from a phone??) make it nearly impossible for random folks on the internet to tell the difference between a crack and cosmetic damage.
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Old 12-09-13, 03:20 AM
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Originally Posted by jmX View Post
Probably. Tap it with a coin and see if it sounds "dead". That thick grippy stuff they put on at the stem sometimes bunches up into creases like that, but it's going to be up to you or a bike shop that can see it in person to make 100% sure. Those awful photos (I assume from a phone??) make it nearly impossible for random folks on the internet to tell the difference between a crack and cosmetic damage.
Its dented in a little. I'm going to take it to a bike shop and see what they say. The guy who sold it to me works at a bike shop and also when I got my bike built, the guy who built it used to work at a bike shop and said I should be fine. I just wanted other peoples opinion. But tomorrow I will take it in and see what they say
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Old 12-09-13, 09:20 AM
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FWIW: Any time I ever took a CF anything to a bike shop to ask if it was OK, they'd say no, and admit they basically have to say no or at best say they don't know.

Personally, I'd have to inspect your bars in person to render an opinion but I'll say I've had carbon bars that had a stickers under the clearcoat in the clamp area and the sticker would get smooshed making the bars look dented even though the underlying CF was be fine.
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Old 12-09-13, 12:05 PM
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that sure looks like overtorque to me, which is weird considering it has a higher torque rating than most stems... somebody gorilla'd this one.
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Old 12-09-13, 01:34 PM
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Originally Posted by nhluhr View Post
that sure looks like overtorque to me, which is weird considering it has a higher torque rating than most stems... somebody gorilla'd this one.
This is another reason I switched back from carbon to aluminum bars. Lennard Zinn at VeloNews tells of his carbon bars being cracked when his bike fell off a stand. Zipp's Service Course aluminum bars are very nice and a fraction of the cost of carbon -- another reason I switched back.
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Old 12-10-13, 12:52 AM
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Mount it, lean over it and put your weight on it - as much as you can. If it flexes or makes cracking sounds, or feels iffy, replace it. If it feels solid and indistinguishable from new, keep it.
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Old 12-10-13, 04:11 AM
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Originally Posted by nhluhr View Post
that sure looks like overtorque to me, which is weird considering it has a higher torque rating than most stems... somebody gorilla'd this one.
The torque rating on a stem is about the stem and not the bars. There should be a specific rating for the bars.

That looks compacted which means failure, if not now then later. Get your money back.
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Old 12-10-13, 05:30 AM
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Originally Posted by Bob Dopolina View Post
That looks compacted which means failure, if not now then later. Get your money back.
Agreed.
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Old 12-10-13, 07:48 AM
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Originally Posted by Bob Dopolina View Post
The torque rating on a stem is about the stem and not the bars. There should be a specific rating for the bars.

That looks compacted which means failure, if not now then later. Get your money back.
You might want to re-read my post. Assuming you have to use the lower of any two mismatched torque specs (most stems are 5Nm), this bar should never have been at crush torque.
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Old 12-10-13, 08:08 AM
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Originally Posted by bikepro View Post
This is another reason I switched back from carbon to aluminum bars. Lennard Zinn at VeloNews tells of his carbon bars being cracked when his bike fell off a stand. Zipp's Service Course aluminum bars are very nice and a fraction of the cost of carbon -- another reason I switched back.
And of course Aluminum bars never fail.

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Old 12-10-13, 08:21 AM
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over torqued or misaligned clamp.. but if you are lucky they will warranty them in spite of the user error.
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Old 12-10-13, 12:31 PM
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Originally Posted by Herbie53 View Post
over torqued or misaligned clamp.. but if you are lucky they will warranty them in spite of the user error.
I bought these used. I got a good deal on them but i guess it wasnt that great after all. Its been a while since i bought them so i doubt they will want to give me the money back.
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Old 12-10-13, 12:51 PM
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Originally Posted by merlinextraligh View Post
And of course Aluminum bars never fail.
Looks like some person with a "perspiration" problem has been living on that bike..... either that or the bike has just been fished out of the ocean.
Perhaps it was a science experiment???
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Old 12-10-13, 01:04 PM
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Originally Posted by redbike72 View Post
Looks like some person with a "perspiration" problem has been living on that bike..... either that or the bike has just been fished out of the ocean.
Perhaps it was a science experiment???
Coastal environment, and some time on the trainer.

It pays to rewrap and inspect your aluminum bars from time to time, particularly with either of those two conditions.
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Old 12-10-13, 01:45 PM
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install it, stick it in your trainer, bear down on it with the force of a thousand waterfalls. sprint in the trainer pulling up on it. If it doesn't fail that abuse it probably won't fail on the road

of course there's always a chance. better question is your level of risk aversion
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Old 12-10-13, 01:52 PM
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Are they gray market?
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Old 12-10-13, 06:33 PM
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Originally Posted by Bob Dopolina View Post
The torque rating on a stem is about the stem and not the bars. There should be a specific rating for the bars.
Bob,i agree with you completely. I have to say I have never seen a handlebar that came with its own torque specification. Every manufacturer I have experienced says to refer to the stem spec. That cost me a Kestrel ultralight handlebar at just over 4 Nm on the way to the recommended 6 Nm. Craaaack! Now I just use 2 Nm on the replacement and it is damn firm in the stem. Not going anywhere. I think torque specs for bikes are generally exaggerated.
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Old 12-10-13, 10:18 PM
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Originally Posted by merlinextraligh View Post
And of course Aluminum bars never fail.

Yes, all materials fail. I choose to stay with aluminum bars. In the unlikely event they should fail, they're much cheaper to replace. I have no problem with carbon. My Look 585 is, of course, carbon. As is the Campy crank. Everyone should use what they feel comfortable with.
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Old 12-11-13, 01:06 AM
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OP ask yourself what is cost more new bars or a medical bill for the injuries you will sustain when those things snap at the worst possible moment?
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