The Eibach Load - Leveling kit is optimal for vehicles which are frequently loaded and unloaded for towing, camping trips, or overland expeditions. Armor, roof - top tents, storage shelving, full size spares and tire carriers increase weight ultimately effecting static ride height of your vehicle. The addition of the height adjustable perch allows fine tuning of rear ride heights, keeping your chassis clear from the trail, and tires clear from fender