Is your spring cranked up all the way, if it is then maybe polaris has optional springs. Myself I went for the Assault shock and spring on my 2011 Pro 163. I'm not into pumping up my shocks or checking air pressure every couple of rides like with fox floats. The Assault shock is very adjustable, with the spring and with the clicker knob. Reliability is why I went with the Assault shock, it should last forever and when there is a problem or I just need an oil change then my dealer can do it all . If I get a new PRO this shock will definitely go on the new sled. Hope this helps.