The Air Lift LoadLifter 7500 XL series kits are built to provide 7,500 lbs of load-leveling capacity. This heavy duty air spring system provides a solution for vehicle squat, which can result from carrying heavy loads. By properly distributing weight to all four wheels, the LoadLifter 7500 XL maximizes vehicle stability while eliminating unsafe and uncomfortable driving conditions such as poor braking, unresponsive steering, trailer sway, body roll and bottoming out. This kit also smooths out the formerly rough ride that could result from heavy duty towing and hauling. The 7" double-bellows air springs have been specifically designed to handle extreme loads and offer greater leveling at all pressures. The air springs are constructed with a reinforced two-ply fabric for maximum strength and long-lasting durability, and feature end caps made of light and ultra-strong corrosion-proof nylon composite. The LoadLifter 7500 XL kits come with Air Lift's exclusive roll plates, which protect the air springs from sharp edges and increase load capacity up to 10 percent.