I've hooked up my 5th wheel for the first time on my 06 Sliverado. The trailer sits high in front about 4 inches mesuring from the ground to the curve under of the skin. The space between the bottom of the 5th wheel and the Retrax bed rail is about 5 1/2" so I guess that is about right. The truck levels out good with 40-50 psi in the RITE-RIDES. The tortion bars are cranked and I'm running 285/70R/17 tires. Is 4" too much or should I try rasing to the next hole of the spring equalizer? There are also holes to raise the spring shackle. I have never messed with this type of spring setup and don't want any suprises. If I change it I want to do it right the first time.