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Dropper post into a...
 

Dropper post into a carbon frame - fitting advice.

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Forgive my ignorance... noob to the carbon frame world.

I've spent a good hour gradually yanking an alloy dropper post out of a carbon frame.  I didn't fit the post in the first place, bought the bike second hand, so not my doing.

I'm fitting a new post, again alloy, what should I apply to the post so that future removal isn't a massive battle?  Anti-sieze paste? Some form of grease? Or just nice and clean and dry, and regular removal to ensure no galvanic issues occur?  Post is fitting nicely, and I've given the inside of the seat tube a good clean.

Thanks in advance, from someone who's never owned a carbon frame before.  


 
Posted : 04/06/2026 3:39 pm
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Pretty sure carbon paste is the answer here. But I don't have a carbon frame, hopefully someone else can advise... 


 
Posted : 04/06/2026 3:51 pm
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Yep, carbon paste, and make sure you remove, clean and refit at least annually, or more frequently if it gets wet and dirty regularly. 


 
Posted : 04/06/2026 3:55 pm
seadog101 reacted
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Carbon Paste then it is. I think the issue I had pulling out the old one was that it hadn't been moved since fitting initially.


 
Posted : 04/06/2026 5:22 pm
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I think it can depend on the frame too. My first carbon frame was a Santa Cruz which I think must have had a non-carbon liner in the seat tube. Result - post moved freely. Then I had a Kona ... which didn't have a liner. Result - a scary few days of trying to remove the seat post and vow to use carbon paste. But yes that grit makes a mess of the seat post paintwork.

 


 
Posted : 04/06/2026 11:45 pm
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If the bike has a larger seat tube diameter, you can fit a 30.9 dropper with a plastic shim. Use a good quality shim that is at at least 100 mm long (or at least as long as the minimum insertion depth of the frame), lube the outside of the shim with carbon paste.


 
Posted : 05/06/2026 4:44 am