Carbon Seat Post in Alloy Frame??

we use it on carbon posts in carbon frames but when its aluminium and carbon it sill tends to cause problems with the materials bonding together.

we normally get 2-3 customers a year who have used carbon paste/grease who ask us to try and remove there post for them but there is no chance.

they normally have to go to an engineering firm to get the post reamed out or try some home brew remedies of chemicals which normally make matters worse lol.

Bedfordshire Clanger wrote:

Not a problem - put some grease on the post to stop it from sticking if it's a very tight fit and don't clamp it too hard.

DO NOT put grease on your carbon seatpost in an alloy frame. over time it expands the carbon which will then be near enough impossible to take out of your frame or adjust.

some companies say use carbon specific grease but i wouldnt use this eaither. you are better off no grease at all and setting it to the correct torque.

Copied from another site :
From Easton:
No grease on carbon posts. Grease contains certain minerals that can attack clear coats, can penetrate the resin matrix and could cause swelling of the composite laminate. Can you say "stuck seat post?" Don't use grease.
John G. Harrington
Vice president, bicycle products
Easton Sports, Inc.

From Campagnolo:
No grease. In some cases it can be dangerous to use grease as the chemical composition can cause a reaction between materials. Besides, it increases the torque required to clamp the post.
Richard Storino
Campagnolo USA

From Deda:
Absolutely no grease on carbon, ever. Also, do not use solvents to get old grease off, or to get old grease out of the seat tube. John Harrington of Easton and I believe that many solvent residues in the seat tube soften the gel coat of the carbon, then bond the gel coat to the inside of the seat tube, freezing the seat post in position for eternity.
Tom Franges
Deda Elementi North America tech support