I've got a VP Free and I noticed that it is very stiff even when I have only 1 turn of preload. The shock is a manitou 6-way swinger. The low and high speed compression are both completely off and the chamber is at 90psi. (recommended 50-175) The sag is just right when I set it up but today I was riding on a rock garden and there was this kid in front of me who was going quite a bit faster than me. He looked pretty smooth and here I was getting kicked around pretty hard. I dont know if its the spring or some adjustment or just the nature of this bike.... It has a 450lb spring and I weigh about 160lbs with gear.