Coil-Over Spring500 lbs Spring Rate10'' Free Length2-1/2'' I.D.Blue Powdercoated Finish1/pkg. When it comes to coil springs for coilovers, RideTech supplies Hyperco Hypercoils exclusively.�These 10" coil springs are available in a wide range of spring rates, Hypercoil coil springs are manufactured from high tensile chrome silicon steel�--�the highest grade spring material available. The high tensile steel wire used in Hypercoils is�lighter and allows additional travel before reaching�coil-bind. Hyperco's advanced engineering produces coil springs that achieve the same length and rate with fewer coils�than�other brands. In many cases, Hypercoils�use three�less coils and smaller diameter wire (.480" vs. .510"). This allows for an additional 1.8" of compression (6.4" vs. 4.6") which equates to better travel. During the manufacturing process,�Hypercoils undergo two�separate magnaflux inspections to ensure�that all coil springs are free from surface imperfections that might�lead to early failure. Hyperco�employs a unique combination of state-of-the-art CNC equipment along with�small town craftsmanship to produce the�finest coil springs available anywhere in the world.Choose your coil springs using the selector above.le="height: 41p