Heading out tomorrow for another little tour before it rains away our snow, trails are hard packed now from the traffic hoping to see alittle difference in mileage on the hard pack we will see, something I noticed with my single shot rear suspension fox float shock is that it looses air, around 20 psi after the last ride, I had 220psi when I went for a ride on Saturday yesterday I checked it and it only had 200psi in it, is this normal? my front fox floats never lost any psi, I wonder what's up with that.