The King Shocks 3.0 ID coil spring is specified with a 3.0-inch inner diameter, a 12-inch free length and a 600 lb spring rate. Intended for coilover-style assemblies accepting 3.0-inch ID springs, this high-rate option is for setups needing greater stiffness or load support. Use it to alter handling characteristics when a 12-inch, 600 lb spring best matches your suspension requirements.
King Shocks 3.0 ID Coil Springs 12 x 600lb