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Singing Those Campy Carbon Record Seatpost Blues(6 posts)

Singing Those Campy Carbon Record Seatpost BluesGregory Taylor
Oct 1, 2003 9:40 AM
Hey, anyone out there come across the following:

My Dean has returned to the land of its birth for some repairs caused by a stuck seatpost. The offending piece is a beautiful Campy Record carbon seatpost. It was always a tight fit in my frame, and after about 10 months of service it finally decided to permanently wedge itself in the frame. Stuck. The seatpost she no move.

Anyway, I did eventually get the post out of the frame...along with the sleeve that Dean presses into the seattube for just these situations. Oops.

The frame was sent back to Dean, along with the offending post. The Dean Dudes have repaired the bike and, curious to determine what caused the problem, they measured the seatpost.

Surprise, surprise, it was slightly oversized. It measured 27.25 mm -- the Dean guys said that most 27.2 posts are supposed to measure slightly undersize (27.185) for a good fit. I'm going to have a machinist buddy of mine check this out when I get the old seatpost back. They also said that they've seen this with a couple of other Campy carbon fiber posts.

Dean has repaired the bike and it is on its way back home. They also hooked me up with an Easton seatpost at a really good ($75) price. Once again, I'm happy with the guys at Dean...
re: Singing Those Campy Carbon Record Seatpost Blueslyleseven
Oct 1, 2003 10:03 AM
It happened to me with an Easton carbon seatpost. I don't think that small of a difference in the seatpost tube is the culprit. I switched to aluminum and have had no problems since.
Well...Gregory Taylor
Oct 1, 2003 10:32 AM
If the post is oversized to begin with, it certainly isn't an optimal situation.

However, I'd be curious to know whether carbon posts get stuck more often than ti or alumuinum ones. The shiny gelcoat on my Campy post had come off where it was inserted in the seat tube -- did this create a "grabby" surface?
Sorry to hear that. Running Campy carbonsNo_sprint
Oct 1, 2003 10:22 AM
in both my currently built rigs. No problems.
Making excusesKerry Irons
Oct 1, 2003 4:37 PM
It's a great story, but there's no way that .05 mm is going to cause the problems you experienced. Think about it - in a frame with a conventional seat post bolt, the FRAME has to take up more diameter change than that. It could just as easily be that the Dean insert was off-size. Look elsewhere for an explanation.
You could be right. I'm gonna measure the seatpost. nmGregory Taylor
Oct 2, 2003 2:01 PM