To install that seat post, you would remove your stock seat post. Take the seat off the stock seat post. Attach the seat to the new seat post. Insert the seat post in to bike. You will probably need an allen type hex wrench.

You should also find out the length of the Biologic suspension seat post. If it is shorter than your stock seat post, folding will become a little tougher. Notice how nicely your bike rests on the bottom of your seat post when folded now. If that seat post were shorter, imagine what will happen.

The Dahon thudbuster seat post is shorter than the stock seat post. At least the slide in the tube section is shorter. This affected my fold.

I have used seatposts similar to the Biologic on other bikes and all I can say is that there is no comparison between that suspension technology and the suspension technology of the thudbuster. Thudbuster is in another league, and worth what they charge in my opinion.

Best of luck to you!