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PostPosted: Sat Mar 30, 2013 11:19 pm 
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ive got a carbon post in a ti frame and ive always had problems with it slipping, ive just changed my clamp to a QR type to try and get more leverage but it seems to have got worst, any ideas? any solutions?


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PostPosted: Sun Mar 31, 2013 12:45 am 
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What makes of clamp have you been using?


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PostPosted: Sun Mar 31, 2013 1:35 am 
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had a USE clamp was ok but I kept damaging the bolts form tightening to much, ive just got a hope QR and I cant tighten it enough


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PostPosted: Sun Mar 31, 2013 4:48 am 
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You need to use something to stop the post slipping that is specifically designed for carbon such as:-

http://www.amazon.co.uk/dp/B0012RIEM6/ref=asc_df_B0012RIEM612605658?smid=A35DUUJN0J4A59&tag=hydra0b-21&linkCode=asn&creative=22218&creativeASIN=B0012RIEM6&hvpos=1o3&hvexid=&hvnetw=g&hvrand=21113861272020091650&hvpone=&hvptwo=&hvqmt=


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PostPosted: Sun Mar 31, 2013 9:29 am 
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lumos2000 wrote:
had a USE clamp was ok but I kept damaging the bolts form tightening to much, ive just got a hope QR and I cant tighten it enough


Mmm... Get a decent clamp like Salsa or Chromag (if you're feeling flush).
I assume both clamp and post are the right size?


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PostPosted: Sun Mar 31, 2013 10:41 am 
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yeah get some carbon paste or something to stop it slipping, had to use that on my carbon road bike, seatpole slippied...not anymore (although may be stuck permanently)


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PostPosted: Sun Mar 31, 2013 11:34 am 
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It's not about getting the clamp as tight as possible because you could end up damaging/crushing the carbon post, like others have said you need some carbon paste which will help the post grip inside the seat tube


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PostPosted: Sun Mar 31, 2013 10:52 pm 
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1210tech wrote:
It's not about getting the clamp as tight as possible because you could end up damaging/crushing the carbon post, like others have said you need some carbon paste which will help the post grip inside the seat tube



I have been worried about that, I put a ally post in today to see if it was any different but had the same problem, In the end I had to wind the nut with a pair of plyers to get it tight. it lasted a full days ride with no problem. I will have a look into the carbon past stuff. thanks

the post is 27.2 im 98% sure its the right size, I was surprised the ally post slipped too


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PostPosted: Sun Mar 31, 2013 11:09 pm 
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creates friction and reduce slippage :) hehehe cool.........................................


(sorry, watching beavis and butthead)


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PostPosted: Mon Apr 01, 2013 7:54 pm 
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try a dab of carbon paste. this contains tiny balls that help grip the post.

the post you have, 27.2mm is tiny - most mtb post are typically 31.6 to 34.9 mm so have a larger surrface area.

I have found that doing up lightweight seatpost clamps results in the ends of the clamp bending so the force does not go to clamping the post.

read about it here:

http://weightweenies.starbike.com/forum ... er#p940868


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