With air ride you have room for longer or shorter travel with the cylinders. I am installing two hydraulic shocks on the rear of my 07 America. The problem to look out for is the angle of the shock, if you let the shock go horizontal to much you risk bending a cylinder or destroying a seal. The system I'm installing is to raise and lower the bike along with shock absorption. When I can afford to add a Springer front I will add a cylinder to it and it will allow me to eliminate the kick stand and just drop the bike to the frame. If I can help with anything feel free to ask.
