How do you dissolve aluminum seatposts?

Squirt ammonia around the seatpost and let it sit overnight. Ammonia dissolves aluminum oxide, and automotive anti-freeze or cola (yes, the soft drink) often will as well; penetrating oil will only work with a steel seatpost in a steel frame.

How do you get a stuck alloy seatpost out of a steel frame?

Use frame as a lever and twist. Frame upside down and place the seat clamp in a large vice, spray plus gas into the seat tube bottle bosses or BB area, leave for a few hours/overnight, grab frame and twist side to side and it should free off, if it doesn’t then repeat plus gas and leave a bit longer.

Can you put an aluminum seatpost in a carbon frame?

Grease will work just fine unless the post slips, then you need the carbon assembly paste. For those who fear grease, carbon assembly paste is grease with some grit in it.

Is WD 40 safe for carbon fiber?

32 oz. WD-40 Specialist® Bike Cleaner is a biodegradable foaming wash that is easy-to-use and safe on all parts and surfaces. Safe for use on all bike surfaces including carbon fiber, titanium, chrome, steel, aluminum, rubber and plastics.

How do you unstick a carbon seatpost?

Squirt penetrating oil around the seatpost, and let it sit overnight. To get the most penetration, remove the bottom bracket, turn the bike upside down, squirt the penetrating oil in from the bottom of the seat tube, and let it sit overnight. The next day, stand over the bike and twist the saddle.

Is oil bad for carbon fiber?

You should definitely put some kind of lube on the post and inside the seat tube, and, no, it won’t damage the carbon. And don’t worry about getting chain lube or other oils or greases on your chainstay or any other part of the frame. It won’t damage it.

How do you remove the seatpost from a bike?

For the most recalcitrant cases, if the seatpost has a one-piece saddle clamp, you can mount the top of the seatpost in a vise, then twist and pull the bike or frame. If you have an assistant handy, have one of you apply the force in a rotational direction, while the other applies force to pull the frame away from the seatpost.

Can you put an aluminum post in a carbon frame?

When inserting an aluminum post into a carbon frame, it is important to apply a barrier between the two surfaces. This is also true when installing a carbon post into a steel or aluminum frame. A “galvanic reaction” occurs between the two different materials and this acts to eventually bond the post to the frame.

How do you fix a bike seat that won’t stay up?

Remove the bottom-bracket parts, cork the top of the seatpost if it is open, and with the frame upside-down and a saddle attached to the seatpost, drop chips of (dry) ice or pour liquid nitrogen down the seat tube into the seatpost. Then hold the saddle down on the floor with your feet and twist the frame.

Can you Hammer in a seat post with a pipe wrench?

The risk you take with a lot of force with a pipe wrench is you bend the bike or brake off the post or get the post out of round. You should grease the seatpost to help prevent this. If you don’t bend the post then I would reuse it. It is most likely rust. You cannot hammer in an over sized seatpost.