The spacers basically compress the coils forcing the ride height up. This will make the ride rougher and cause the coils to eventually sag. It takes a while to notice any major sag. I wouldn't recommend spacers for a long term lift. If you're going for looks, I'd recommend a slight body lift. You won't gain ground clearance, but you'll be able to fit bigger tires and it won't effect the ride of the runner. I am considering a spacer lift because I'm strapped for cash. I'm wondering if a spacer lift can be installed with shocks that aren't the greatest. And also if wheel spacers are required, and what size is safe without a differential drop. If you're considering a spacer lift, then me posting on this thread might answer all of our questions. Congrats on the Runner and welcome to the forum!