Determine your lower spring specifications
The new springs are printed with specification information on the coil (if not labeled, professional equipment is required to determine the spring parameters). The spring specifications include inner diameter (2.5, 3.0, 3.75), height (4 to 26), and spring ratio (80 to 1000).
The spring in the picture has a diameter of 3.0, a height of 14 inches, and a spring rate of 650 pounds.
Note: All springs come in regular production and special customization.Build your offroad Shocks kit.