Thanks for the input guys..
How does the tire drop actually work? Is it recommended to have the side threads touching the ground when loaded? I tried using different pressures in the rear tire from 60-75 psi but when I load up something in the rear rack, the back portion ride feels stiff when passing through bumps. Or probably its because I haven't ridden a bike in 8 years and that I'm not used to its feel yet.
Oh, and how often do you guys check and pump your tires?