Dahon Postpump Seatpost. The DAHON PostPump gives you an air pump within your seat post, saving space and weight. It's always ready, hidden from the elements and thieves, while making sure you are never without a pump when you need it. Flip open the seatpost quick release and you've got a 100psi floor pump with a padded handle (your seat) and foot peg. Dahon Postpump Seatpost. The DAHON PostPump gives you an air pump within your seat post, saving space and weight. It's always ready, hidden from the elements and thieves, while making sure you are never without a pump when you need it. Flip open the seatpost quick release and you've got a 100psi floor pump with a padded handle (your seat) and foot peg. Seamlessly incorporated into seatpost Reaches 100 psi in less time than other mini-pumps Fits Presta and Schrader valves Aluminum alloy
