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Old 08-24-08, 02:00 PM   #1
CKey_Cal
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Knock and creak from seat post

After about 400 miles my Specialized Roubaix developed a "knock" which turned into a pronounced "creak" after another 100 miles or so. I finally determined it to be the seat post by removing it and re-greasing the seat post clamp. The seat post has the words "do not grease seatpost" right on it, so I didn't.

The problem is that the knock came back after about 200 miles. About 2 weeks. I repeated the above and now its fine again. Is this normal? It seems a little to soon to me to have to re-grease. What could I be doing wrong?
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Old 08-24-08, 02:12 PM   #2
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If you fixed it, then whats the problem?
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Old 08-24-08, 02:18 PM   #3
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If you fixed it, then whats the problem?



The problem is that the knock came back after about 200 miles.
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Old 08-24-08, 02:20 PM   #4
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Use carbon prep on carbon components to stop creaks. I had the same problem on my Roubaix.
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Old 08-24-08, 02:24 PM   #5
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Use carbon prep on carbon components to stop creaks. I had the same problem on my Roubaix.
Excuse my ignorance. This is only my second bike - but what is carbon prep and how do I use it?
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Old 08-24-08, 09:30 PM   #6
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Excuse my ignorance. This is only my second bike - but what is carbon prep and how do I use it?
You have a CF seatpost which is too smooth to use grease on. Un-greased ones have been known to slide down over time and use. Carbon prep is like grease for carbon, basically. Here you can buy it (thought you can find it cheaper elsewhere), but more importantly they'll tell you all you need to know about anything you can buy there: http://www.competitivecyclist.com/ro...3321.52.1.html
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Old 08-24-08, 10:06 PM   #7
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You have a CF seatpost which is too smooth to use grease on. Un-greased ones have been known to slide down over time and use. Carbon prep is like grease for carbon, basically. Here you can buy it (thought you can find it cheaper elsewhere), but more importantly they'll tell you all you need to know about anything you can buy there: http://www.competitivecyclist.com/ro...3321.52.1.html
Thanks. Is that the same as this stuff?

http://www.jensonusa.com/store/produ...n+Compoun.aspx
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Old 08-25-08, 11:48 AM   #8
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that's really a cute bunny.....................
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Old 08-25-08, 02:32 PM   #9
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Thanks. Is that the same as this stuff?

http://www.jensonusa.com/store/produ...n+Compoun.aspx
Yes, same functionally, but it seems to look more, well, bright, lol.

Now that I am looking into it, would carbon assembly paste be that same at car detailing stuff, specifically gritbased swirl and scratch removers? Oh and that was directed to people more in the know - sorry, OP.

By the way, I don't know how your LBSs (Local Bike Shops) are, but I have one here that'll sell me just a dollop of grease/assembly paste/stuff like that in a little baggie for a buck. That might be the way to go.

Last edited by z415; 08-25-08 at 02:39 PM.
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Old 08-25-08, 02:37 PM   #10
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that's really a cute bunny.....................
Thanks, bunnies are cool. Has qualities of dogs and cats and will always act like a adolescent human child.
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