Pulled my campy record carbon post out of my Caad 7 to ship it and the inserted section was covered with a white, chalky, dusty substance. I really had to work to get the post out too. Any recommendations for whether I should be using grease on the post or some other substance or keep it dry? Thanks.
carbon post - lube?
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No grease
I researched this in the past as well. I seem to remember a Zinn article on Velonews.com. Most greases can apparently break down the resin. The recommendation was to just periodically loosen the binder and give the seat a llittle twist back and forth.
You can try searching further back in the archives you have to tweak the time frame at the bottom of the web page.
I researched this in the past as well. I seem to remember a Zinn article on Velonews.com. Most greases can apparently break down the resin. The recommendation was to just periodically loosen the binder and give the seat a llittle twist back and forth.
You can try searching further back in the archives you have to tweak the time frame at the bottom of the web page.
The other reason not to was that--to achieve adequate torque to keep a greased CF seatpost from slipping--you risk crushing the post.
Expensive move. Don't recommend it.
Clean the inside of your seat tube, and your post, thoroughly (simple green or whatever), then insert and torque the bolt ... no grease.
Expensive move. Don't recommend it.
Clean the inside of your seat tube, and your post, thoroughly (simple green or whatever), then insert and torque the bolt ... no grease.
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985 Posts
This issue was massively discussed and final conclusion was that "greas breaking down resin" is outright myth. As Creig (have I written name properlyhfc said:
) Calfee stated "the only commomly used substance that may damage resin is paint remover (but not paint thinner)".
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21,725 Posts
The answer
As others have noted, grease will not harm the CF post. If you are worried about it, you can always use a silicone grease. The reason not to lube a CF post is to prevent it from slipping, not to protect it from attack by the lube. If your post doesn't slip with lube on it, then grease will prevent the oxidation of your frame.
The white powder was almost certainly aluminum oxide - from your frame oxidizing. It's the Al version of rust. You have two choices: 1) frequently remove your CF post, wiping all parts (including inside the frame) so that you can remove the oxide and make it possible to remove your post when you want to, and 2) lube the post.ridewt said:
As others have noted, grease will not harm the CF post. If you are worried about it, you can always use a silicone grease. The reason not to lube a CF post is to prevent it from slipping, not to protect it from attack by the lube. If your post doesn't slip with lube on it, then grease will prevent the oxidation of your frame.
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