the spring rate of your choice. Thanks for the comps. Not sure how much it dropped. Had the .8" springs on before. Height from ground to wheel well is now 25.4". Give or take .2". Could still go down possibly .5-.75". As far as the tension rods are concerned, well, I'm not too sure except for them adjusting the caster which usually is affected with lowering. Get with "search" and type in tension rods for the technical forum. There will be many explanations for you....and me as well:)