If you need help with suspension to reduce sag these are great. They do NOT increase the weight you can carry in or on the truck, but they offer a much better ride when fully loaded. I have a 3200 pound finger on my Ram 3500 and it sagged a little more than I wanted. Timbrens solved this problem and the load ride is much better. Does not affect unloaded driving as they have no contact with the axle when unloaded.