Swift springs are manufactured with a unique spring compound "H5S.TW", which is stronger than silicon chrome. It is so resilient that it requires 2 rounds of shot peening in order to hold its coil shape and it is so strong that it needs thinner wire compared to other manufactures. It also needs fewer coils, which lowers weight while increasing available stroke. Springs are preset to reduce the sag experienced after installation and are given a 2-stage melamine coating providing an attractive layer of protection.
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