hey Kaitlyn,

Unless you have an "active" suspension that is adjustable from the truck, the suspension components that are advertised as adjustable are not done so easily. It's more of a "pick a setting" and leave it type deal.

I am going with an Ironman 4x4 kit, and they have options for the suspension stiffness. For example, I'm doing a 3" lift in the front and choosing "Performance mode" which is their standard spring. However they offer a "constant load" spring that is advertised as carrying 110-220lbs additional weight. You might choose that if you towed almost all the time or had a lot of extra weight from accessories on your Runner, but otherwise the Performance spring gives a better ride under normal conditions, which is what most of us do 95% of the time.