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Posted

Hi

 

 

 

I have a carbon MTB frame and an Aluminum seatpost. The carbon seems to rust or corrode the aluminum and makes the post stick in the tube.

 

 

 

I know now that I should have moved the seatpost around from time to time and cleaned it regularly. I will do this with the new post

 

 

 

What I want to know is whether I must grease the post and if so what grease must be used and how much must be used?

 

 

 

Thanks, Matt

Posted

Matt, there is no solution to your problem other than to regularly remove it and give it a good wipe.

 

Grease seems like a solution but it isn't. What happens with grease is that water trapped between the post and frame, gets massaged as the frame flexes and eventually the grease absorbs the water to form emulsion. This emulsion is what causes the problem.

 

Unfortunately I haven't time right now to give you al detailed description (class in 7 minutes) but search here for me as the author and "emulsion."  It'll explain it all.

 

 

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