A dropper seatpost works with hydraulic or mechanical power. The bike rider uses a lever (usually located on the handlebar or seatpost) to easily lower the seatpost as they are riding. The lever moves hydraulic fluid or a mechanical cable through the hose to raise or lower the seatpost.

Do you put air in a dropper post?

All dropper posts use a spring to extend the seat upwards. In some posts, this air spring is small and held at relatively high pressure (around 200 – 250 psi). When the post is in the dropped position, that air pressure can be up to 3 times higher.

Can I put a dropper post on any bike?

Dropper seatposts, or popularly referred to just as dropper posts, are one of the best upgrades you can make to any mountain bike. ... With a remote actuation that mounts on the handlebars, these seatposts allow riders to change the height of their seat without getting off their bike.