A lot of road bikes come spec d with aluminium options until you reach around the.
Carbon fiber seatpost in aluminum frame.
Given the potential for galvanic corrosion where carbon and aluminium are in contact in a wet environment a carbon seat post is probably a good idea in a full carbon frame.
With a steel aluminum or magnesium frame spray oil or better yet frame saver into the seat tube to arrest the corrosion process.
A galvanic reaction occurs between the two different materials and this acts to eventually bond the post to the frame.
Re grease the post and the inside of the seat tube and then.
A carbon seatpost is lighter and promotes comfort seatposts are generally constructed from aluminium or carbon.
I gave the seatpost a light coating and reinserted it.
The seatpost now stays put without having to tighten the clamp too much.
When inserting an aluminum post into a carbon frame it is important to apply a barrier between the two surfaces.
The bike shop sent me a little sachet of carbon assembly paste to try.
I ve subsequently bought a pot of the carbon paste and whip the post out every 6 months or so for a quick wipe down and reapplication.
Remember zinc carbon.