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Carbon post damage?

Old 07-28-20, 09:07 PM
  #1  
Road bikie
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Carbon post damage?

Hey guys,

I managed to trade in my previous bike for tcr advanced sl 1 disc 2020. Extremely happy how it rides! They cut the seat post to my dimensions. Im just putting it together when i noticed slight damage on the post where they cut it. Is this a concern? Just as expected during cutting process? The forum doesn't let me attach pics. . The paint has been chipped and maybe some carbon fiber on the outside.
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Old 07-28-20, 09:28 PM
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You have 10 post now, so post a picture.
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Old 07-28-20, 10:13 PM
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Originally Posted by Road bikie View Post
Hey guys,

I managed to trade in my previous bike for tcr advanced sl 1 disc 2020. Extremely happy how it rides! They cut the seat post to my dimensions. Im just putting it together when i noticed slight damage on the post where they cut it. Is this a concern? Just as expected during cutting process? The forum doesn't let me attach pics. . The paint has been chipped and maybe some carbon fiber on the outside.
if itís just a little tough around the edges, but there are no cracks or distortion extending upwards into the post, just clean up the edges with sandpaper (wear a mask) and maybe dan some clear coat (clear nail polish works) to seal the cut edge. Should be fine
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Old 07-29-20, 09:43 AM
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I agree, as long as there is no damage in the clamp area it should be fine.
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Old 07-29-20, 03:38 PM
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The post may be fine but keep in mind the poor attention to detail in the event of possible future work done on your bike by that shop.
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Old 07-29-20, 04:16 PM
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JB weldit on the inside and call it a day
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Old 07-29-20, 09:16 PM
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Originally Posted by Litespud View Post
if itís just a little tough around the edges, but there are no cracks or distortion extending upwards into the post, just clean up the edges with sandpaper (wear a mask) and maybe dan some clear coat (clear nail polish works) to seal the cut edge. Should be fine
hey guys pls see the pictures and let me know what you think.





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Old 07-29-20, 09:41 PM
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Originally Posted by Road bikie View Post
hey guys pls see the pictures and let me know what you think.
Not sure what they did at the front edge - what looks like a cosmetic outer layer has detached a little. However the CF underneath looks undisturbed. Personally, Iíd have no concerns with cleaning up the cut edge and just using it.
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Old 07-29-20, 11:01 PM
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Is t hat a seat TUBE rather than a seatpost?

Cheers
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Old 07-30-20, 12:21 AM
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Originally Posted by Miele Man View Post
Is t hat a seat TUBE rather than a seatpost?

Cheers
Integrated seat post.. its tcr sl1 2020..
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Old 07-30-20, 08:08 AM
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Originally Posted by Road bikie View Post
Integrated seat post.. its tcr sl1 2020..
I think Iíve seen this arrangement referred to as a ďseat columnĒ
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Old 07-30-20, 08:11 AM
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Appears cosmetic. Shouldn't matter, as the mast topper will cover it by a whole lot. You can put a dab of superglue on that area if you feel so inclined, but I don't see an issue.
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Old 07-30-20, 08:12 AM
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Honestly that looks to be a bad job at cutting by the shop but it does appear to be just on the surface. You may want to cover the area so moisture does not get behind and saturate the carbon.
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Old 07-30-20, 03:03 PM
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I hope you don't mind me asking this here. How do you attach the saddle to the seat column?

Cheers
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Old 07-30-20, 03:38 PM
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Go for a warranty replacement
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Old 07-30-20, 03:52 PM
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a little wet or dry sandpaper & water, can clean up the edge , but wear your mask while doing it,

as your lungs are seeing carbon dust in the same way they do Asbestos.
or silicosis.

sanding wet keeps the dust down..

basically the cutting was back to front, same thing happens when you cut wood ...
with a saw,
never cut wood?







....

Last edited by fietsbob; 07-30-20 at 04:00 PM.
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Old 07-30-20, 03:52 PM
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I'd apply resin over the exposed cut area to seal out contaminants.
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Old 07-30-20, 03:55 PM
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Originally Posted by Miele Man View Post
I hope you don't mind me asking this here. How do you attach the saddle to the seat column?

Cheers
Fancy carbon race bikes like that, the seat post head goes over that end.. and grips around it..

bit bass ackwards..
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Old 07-30-20, 05:32 PM
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This thread is strikingly similar to one on RBR, except no one suggested to use nail polish over here, yet.

Last edited by ckindt; 07-30-20 at 05:37 PM.
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Old 07-31-20, 10:24 AM
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Originally Posted by Troul View Post
I'd apply resin over the exposed cut area to seal out contaminants.
yup. Any time you cut open carbon fiber you need to seal the cut with epoxy.
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Old 08-03-20, 01:13 AM
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Originally Posted by DrIsotope View Post
Appears cosmetic. Shouldn't matter, as the mast topper will cover it by a whole lot. You can put a dab of superglue on that area if you feel so inclined, but I don't see an issue.
Hey mate, i thought I'll attach another picture as it provides more clarity. I drew 2 circles around the issues I'm concerned about:
1. Chipped carbon shown in the circle on the left
2. Lillie gap in between carbon layers shown in the circle on the right. When i press from the inside of the tube i can see the carbon layer moving.

Do you still think this is not an issue? I've asked the shop for a replacement but they have been very hard to talk to (e.g. "we're looking into it" etc..).
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Old 08-03-20, 05:17 AM
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Originally Posted by Road bikie View Post
Hey mate, i thought I'll attach another picture as it provides more clarity. I drew 2 circles around the issues I'm concerned about:
1. Chipped carbon shown in the circle on the left
2. Lillie gap in between carbon layers shown in the circle on the right. When i press from the inside of the tube i can see the carbon layer moving.

Do you still think this is not an issue? I've asked the shop for a replacement but they have been very hard to talk to (e.g. "we're looking into it" etc..).
That does not look very good. The mark on the back looks like it just might be a crease or something but the front looks like it has opened up. Most carbon repair shops will charge ~$50 to do a check so at this point, it might be worth having someone look at it (not the shop). We (the on line people) could all give our opinions but I would not trust anything but a physical examination by a professional.
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Old 08-03-20, 07:01 AM
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Still looks like carbon cut with a "normal" blade. While I still think the damage is cosmetic, I would be none too pleased about it. See what the shop will do about it. Should be an interesting litmus test.
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Old 08-03-20, 07:17 AM
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Originally Posted by DrIsotope View Post
Still looks like carbon cut with a "normal" blade.
Excuse my ignorance on the matter, but is one supposed to use a specific type of blade when cutting CF like that?
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Old 08-03-20, 07:30 AM
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Yessir. A composite-specific blade will be a "burr," with carbide or diamond grit instead of teeth. You can "get away with" using a 32T, but there's still a chance it will snag the fibers. If I were to guess, I'd say that shop maybe used a dull 24T, and possibly even an 18T. Absolutely the wrong tool for the job.
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