Ok so after riding all day yesterday I decided I should check my tire pressure. I know I should have checked them before I rode yesterday all over the desert and the rocks but I did I decided to to to it today. Well needless to say I was shocked to see that the pressures were all the way down to 9.5 to 10.5 PSI. Well the owners manual says that the recommended pressure should be 21 PSI for the front and 22.5 for the rear. This is for the Viking 6 all stock tire and rims. The funny thing is I just got this back after the recall so I know I did not lose this much pressure as I keep my Viking in the garage. BTW the ride of it on Saturday was nice and smooth, after I aired up the tires the ride was noticeably rougher over the same terrain and even bogged down in loose sand to the point where I had to lock in 4WD. So I guess the question I have is what is everyone running as far as tire pressure goes. All my riding is in the desert with sand and rocky areas in Yuma, Az. I also run on the roads as it is street legal for road use here.