I have a 2012 rt. I weigh 226 pounds and the GF weighs ? Ok lets just say it might be 200, might be, not saying it is, just might be! I seem to be bottoming out, that is rear tire touching under side of rear fender I believe. I have the preload air shock at 16 psi right now. I have heard on the preload any where from 10-12 pounds up to 50-60 pounds! Could something be wrong with the rear suspension OR could it be that the GF & (I) are just too heavy for the suspension? Could the rear shocks just be weakening? Any other possibilities? "Be As Blunt AS You Need To Be" with your answers/replies! Thanks