Join Date: Aug 2008
Location: Pacifica, CA
Bikes: Lapierre Pulsium 500 FdJ, Ritchey breakaway cyclocross, vintage trek mtb.
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Yes, you're not supposed to grease carbon seatposts, for two reasons: possible chemical interaction that breaks down the carbon (sounds unlikely and probably could still find a type of grease that didn't have this issue) and because if you make a carbon seatpost slippery with grease, you'll likely need to exceed the torque limit (5nm?) of the seatpost in order to keep it in place.
I bought a slightly used Ritchey steel frame and it came with a nice ritchey wcs carbon seatpost. For the first reasons above, I was hesitant to spray frame saver down my seat tube. The specifications for the carbon seatpost talk about being sure to completely clean the seat tube of any grease and whatnot before installing it. I was also hesitant to use the seatpost dry because as this is a travel bike, it'd need to be removed and replaced many times and I didn't want to damage the seatpost by sliding it in and out without grease. I mean, it was pretty damn hard to get out the first time.
In the end I just decided to swap it out to the aluminum wcs seatpost just in case. (matches my stem and bars better anyway since they are also wcs aluminum). The weight of the aluminum seatpost was very close to the carbon one and I doubt I notice any difference in stiffness/comfort/fashion.
Thirst is stronger than the rules. - Stars and Watercarriers, 1974
Last edited by pacificaslim; 12-30-10 at 09:54 AM.