Our springs are specifically wound for off-road applications, not repackaged car springs.
. Our spring rates, wire diameters and coil lengths have been developed through extensive real world testing on all types of terrain. 3 Inside diameter;10 Length;300 lbs spring rate;Coils are closed and ground to sit flat;High tensile chrome silicon wire;Wound for off-road applications;Made in the USA;California Residents: WARNING King Shocks 3 x 10" 300Lbs Coil Spring for Coilover Shock - SPR3-10-300 Our race winning designs have been put to the test in the heat of battle from Baja to Dakar.King coil springs are manufactured to our specifications in the USA using the finest quality, high tensile, chrome silicon wire available.