Assembly Paste, carbon seatpost into ally frame?

[cosmicbike]

Not played with carbon bikes yet, and if SWMBO gets her way then I won't for a while yet
But, I may sneak a seatpost in, specifically a Specialized Cobl-Gobl-R. This will be fitted to my existing Trek 1.2 aluminium frame. Quick couple of questions
1. Do I need to use assembly paste/compound when fitting? Or perhaps something else to prevent it seizing into the frame over time?
2. I presume the existing seat post clamp will be ok, provided I use a torque wrench so as not to crush the post?

Cheers

 

[MikeW-71]

Yes, you will need some carbon paste to prevent the post slipping in the frame, and a torque wrench would be good for tightening

 

[Globalti]

No you won't necessarily need carbon assembly paste, it depends on how snugly the post fits. We have carbon posts in a Ti and an Al frame and neither needs paste.

Tighten with a standard length hex key as tight as you can with the fingers of one hand, then test ride. If there's a torque setting specified on a little sticker on the frame, do it up with a torque wrench and hen undo with your hex key - you'll be surprised how tight it is.

 

[PatrickPending]

Paste isn't for stopping the post from seizing in the frame - its to stop it slipping down (slowly when you're riding the bike!). I'd use it (and did on my Ti bike and AL ribble) for sure!

 

[bpsmith]

I just asked my bike fitter this same question an hour ago. He said that they had to cut out a carbon seatpost as the guy had not used the paste on fitting. This was a carbon frame to carbon post mind you. I guess the paste is useful in many ways.