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Is this carbon fiber?

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Is this carbon fiber?

Old 08-17-09, 05:55 PM
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Is this carbon fiber?

Was doing some maintenance on my bike this past Saturday and when I pulled my seat post to lubricate it this is what I saw. Does it look like carbon fiber?

I feel like I got ripped off. I thought I was buying a carbon seat post. What should I do if anything?
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Old 08-17-09, 05:59 PM
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CF wrapped alu.
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Old 08-17-09, 06:00 PM
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That aluminum inside with a carbon wrap. Fairly common.
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Old 08-17-09, 06:01 PM
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Actually you can't really tell from that picture. Often times the "weave" is only on the outside. Although it is certainly not uncommon to have carbon-wrapped alu.

OP, what make and model post is it and why did you think it was a full carbon post? Did it say that it was or did you just assume because it looked like carbon?
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Old 08-17-09, 06:06 PM
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Looks like carbon fiber to me. Too dark for aluminum.
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Old 08-17-09, 06:17 PM
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CF wrap...typically done to market alum. posts as better than they are. Decorative.
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Old 08-17-09, 06:27 PM
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Sometimes higher-quality CF will look like that, i.e. be all perfect and smooth on the inner surface, but if your bike cost less than $4K or so and the seatpost came with it, it's almost certainly carbon-wrapped aluminum.
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Old 08-17-09, 06:28 PM
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Looks like carbon for sure. There is no matted dark aluminum finish. Especially not inside a seatpost.
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Old 08-17-09, 06:28 PM
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from those photos, i believe that you have a full carbon post.
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Old 08-17-09, 06:33 PM
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well shucks

Originally Posted by familyguy
CF wrap...typically done to market alum. posts as better than they are. Decorative.
so the carbon wrap is just to make it look pretty! that stinks

Originally Posted by umd
Actually you can't really tell from that picture. Often times the "weave" is only on the outside. Although it is certainly not uncommon to have carbon-wrapped alu.

OP, what make and model post is it and why did you think it was a full carbon post? Did it say that it was or did you just assume because it looked like carbon?
probably stupid of me but I thought it was carbon fork and carbon seat post. I seem to recall the local bike shop telling me carbon fork and carbon seatpost. I checked it out and I do not see a name or model on the post, with it in the bike.

Originally Posted by riff
CF wrapped alu.
that is what I thought. very frustrating.
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Old 08-17-09, 06:34 PM
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So you are chosing to ignore the other posts that say it may still be carbon? Touch it, does it feel like metal inside? Unfinished unidirectional carbon looks and feels more like plastic (or to some degree, wood), than metal.

What bike is it?
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Old 08-17-09, 06:38 PM
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well

Originally Posted by DrPete
Sometimes higher-quality CF will look like that, i.e. be all perfect and smooth on the inner surface, but if your bike cost less than $4K or so and the seatpost came with it, it's almost certainly carbon-wrapped aluminum.
Thanks it cost a lot less than $4k. approximately $700 last years model!
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Old 08-17-09, 06:40 PM
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Originally Posted by RidingMatthew
Thanks it cost a lot less than $4k. approximately $700 last years model!
Then it likely is carbon-wrapped. And the carbon fork probably has more metal than carbon as well (the steerer).
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Old 08-17-09, 06:43 PM
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no but...

Originally Posted by umd
So you are chosing to ignore the other posts that say it may still be carbon? Touch it, does it feel like metal inside? Unfinished unidirectional carbon looks and feels more like plastic (or to some degree, wood), than metal.

What bike is it?
it feels like metal inside. it sounds like aluminum when you tap it with your fingers.
It is a 2007 Scott S40 speedster. bought it in april of 08 and have put 1268 miles on it.
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Old 08-17-09, 06:43 PM
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Originally Posted by RidingMatthew
Thanks it cost a lot less than $4k. approximately $700 last years model!
I wouldn't sweat it. At that price point CF-wrapped carbon is less likely to break or cause you some problem.
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Old 08-17-09, 06:45 PM
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Really?

Take a screw driver and lightly tap it on the inside, see if sounds like you're hitting aluminum or carbon.
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Old 08-17-09, 06:46 PM
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Originally Posted by fauxto nick
Really?

Take a screw driver and lightly tap it on the inside, see if sounds like you're hitting aluminum or carbon.
Nick, read from the bottom up
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Old 08-17-09, 06:56 PM
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Originally Posted by umd
Nick, read from the bottom up
fml
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Old 08-17-09, 07:01 PM
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My stock Bontrager looked like that, it is full carbon though, just not the cosmetic weave all the way through, most carbon bikes (if any) aren't the weave the whole way through, just the top layer.
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Old 08-17-09, 07:14 PM
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100% Real Carbon Fiber decal.
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Old 08-17-09, 07:22 PM
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Originally Posted by RidingMatthew
it feels like metal inside. it sounds like aluminum when you tap it with your fingers.
It is a 2007 Scott S40 speedster. bought it in april of 08 and have put 1268 miles on it.
If it feels like metal and sounds like metal...
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Old 08-17-09, 07:27 PM
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Originally Posted by Flatballer
If it feels like metal and sounds like metal...
... then it must float, which means that it's made of wood... and, therefore, a witch!



OP, I wouldn't sweat having a carbon-wrapped aluminum seatpost. Maybe there's a placebo effect of the carbon layer dampening vibrations slightly, but I can't tell the difference between the same kind of OEM post and a plain aluminum one. At least you won't have to worry so much about over-torquing the seat tube collar and crushing it.
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Old 08-17-09, 07:36 PM
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I couldn't tell any difference when I switched from a carbon richey seatpost to an aluminum tomson. Don't worry about it.
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Old 08-17-09, 07:42 PM
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fwiw its worth, thats what my full carbon fork looks like.
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Old 08-17-09, 08:46 PM
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i have enjoyed riding it. I get compliments on the bike when I meet guys out riding on their full carbon bikes.

What or when would any of you guys recommend upgrading bikes?
I tend to hang on to things a while but I was in the lbs and picked up a CAAd 95 and Madone and was like whoa they are light.

any thoughts? although I am probably more interested in upgrading my mountain bike since it is much older. (see Signature)
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