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LOOK frame seatpost clamp and Carbon posts(6 posts)

LOOK frame seatpost clamp and Carbon postsJFST
Nov 28, 2002 7:12 AM
I recently bought a LOOK KX frame and have been having problems using carbon seatposts with the clamp system LOOK uses for their seatposts. The problem is that the surface area of the clamp is so small that it eventually starts to crush into the carbon seatpost where it makes contact. I'm wondering if that clamping system is even appropriate for carbon posts or are there carbon posts out there that are better suited to this type of clamp. Should I just use a titanium or aluminum seatpost instead? Has anyone else run into this problem?
re: LOOK frame seatpost clamp and Carbon postsDave Hickey
Nov 28, 2002 8:08 AM
I'm not familar with the KX clamp but if it's similar to other LOOK clamps, I'd watch thin carbon seat posts. I'm using the LOOK carbon ergopost and it's very beefy at the clamp area. I know USE redesigned their 25.0 post to make it work with LOOK frames. Is the KX 27.2 or 25.0?
re: LOOK frame seatpost clamp and Carbon postsJFST
Nov 28, 2002 9:01 AM
I believe the KX uses the same clamp as other look frames. The KX uses a 27.2 seatpost. I used an Easton CT2 at first but it was a really old post which has gone through one of my mountain bikes as well as my previous roadbike. It was already starting to deform very slightly from all the use and abuse by the time I put it in the KX so I figured that might have been the cause of the clamp cracking it. Inspecting it carefully now I noticed the clamp only damaged the post towards the side that was already deformed. The other corner was not affected at all. I put in a Campagnolo Record post afterwards and tightened it lightly but the post would still move around when I sat on it. I tightened it ever so slightly and I heard the carbon crack. What a waste of money. I now know Eastons carbon is obiously far superior. Right now I'm using a Thomson seatpost borrowed from my mountain bike but I'm looking into either the titanium version of the campagnolo post, a Litespeed Ti post, or the LOOK ergopost. I figured the LOOK is specifically designed for their frames so it should work but the 27.2 version is either out of stock or not available anywhere I've searched. Is your ergopost showing any sign of damge or crimping where the clamp bites into it? I don't want to waste anymore money on a carbon post just to damage it again.
Thomson wins, no? Good poseur factor, go with what works nmSpunout
Nov 28, 2002 1:38 PM
re: LOOK frame seatpost clamp and Carbon postsDave Hickey
Nov 28, 2002 6:39 PM
No problems with the ergopost showing signs of age. As I said, it's a real beefy post. I had a Record Carbon on another frame and mine cracked also.
re: LOOK frame seatpost clamp and Carbon postsgregflynn
Dec 3, 2002 11:25 AM
I use a USE alien carbon seatpost with my 381i look frame. I have had no problems (in 6-7 months) with cracking but if I had my choice again I would buy a titanium post (USE again).
If you do use a carbon post of course don't grease it and don't over tighten it.