Skyjacker's specifically engineered 2-stage dual rate long travel coil progress from a 1st Flex Rate to a 2nd Ride Rate. The 1st Flex Rate stage delivers a comfortable ride that expands during full articulation and keeps the tires in contact with the terrain. The 2nd Ride Rate stage only engages after compression past the flex rate. Engineered especially for the Gladiator, the rear coils are designed with a higher, stronger 2nd Ride Rate. Whether you pull it or pack it, the 2nd rate allows ride control and stability for added weight activities like overlanding and towing.