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It looks to be about 155-160 lbs/inch but I don't really have that accurate of measuring tools. I tried to do a google search to see if anyone had more accurated measured the spring rate, but to no avail. Hope that helps.
Try one of these:
http://www.engineersedge.com/spring_comp_calc.htm
http://guzzitech.com/springrate.html
http://www.therangerstation.com/tech_library/coilspringrate.htm
http://www.efunda.com/designstandards/springs/calc_comp_k.cfm
http://www.ajdesigner.com/phpspringrate/spring_rate_equation.php
http://www.tftunedshox.com/springcalc.htm

They'll all give close to the same numbers if not exactly the same.


'02 Sportage 1-3/8" body lift 4" suspension lift 235/75-15's on stock rims