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Slipping Seatpost - What can I do?(6 posts)

Slipping Seatpost - What can I do?Scummer
Jan 4, 2003 10:21 AM
My carbon fiber seatpost constantly slips down into the seat tube (titanium, no colar). I've tried a different bolt, and I tighten it as hard as I can without breaking the bolt, but the seatpost constantly works its way down nearly an inch after riding 10 miles. I know, I should lose some weight, but besides that, any ideas?
try an AL seatpost nmgtx
Jan 4, 2003 12:45 PM
re: Slipping Seatpost - What can I do?Roadrunner25
Jan 4, 2003 3:03 PM
Did you remove all of the grease inside your frame?

Clean it really good as weel as the shaft of the seatpost, then try again.

If this doesn't work, try adding a thin piece of shimstock between the post and the frame.
You didn't put any grease on it did you?superdog
Jan 4, 2003 5:20 PM
When I purchased my cf bike my LBS told me to never use any grease on the seatpost. They said it would cause the seatpost to slip and that you can never get the grease out of the cf even if you use a degreaser. Sounds like that may be your problem. If so... you may have to get a new seatpost and de-grease your seat tube before installing the new post.
Jan 4, 2003 6:53 PM
While it may be true that you shouldn't grease the post (typical manufacturer's advice on CF seat posts) the LBS is full of it when they say "you can never get the grease out." The post is epoxy, which does not absorb grease. Wiping with a rag, or at most some degreaser, will eliminate any grease problems.
It must be the wrong size....Bruno S
Jan 4, 2003 11:18 PM
Thompson sells seatposts in many different sizes (even with small variations of just 0.2 mm). This leads me to believe that there are a ton of standard sizes for seatpost clamps. You should shim it.