well from what i could find, these sound like progressive rate springs. front- 14, rear- 12. so it takes 14 lbs to compress them 1mm in the front, 12 lbs in the rear. as they go farther down, it takes more weight to compress them. linear rate springs are rated in total weight settings i believe (dont quote me!) for instance- 240lb springs take 240 lbs to be compressed 1 inch. it also depends on whether the company is saying metric or standard.
so who knows, like i said, contact the company, ask them these same questions. if they cant give you any info, i say bogus and bag em. ppl who dont know their product arent worth buying from.
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87 toyota 4x4 single cab short box pickup, 7MGZE.
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