I wanted compile a list of all the popular coil spring brands and sizes and their spring rates. I had a tough time finding these when I was researching my lift so I thought I'd put them in a central place. Help me out with the stock spring rate. All I could find for Up Country 1" and Rusty's 2.5" is that they are approximately 10# and 12# heavier then stock spring. And I could not find Zone's 4" spring rate. Also double check my numbers, most I pulled off many Jeep Forum searches. Hope this helps
I seem to remember a brand quoted their coils as being "x % stiffer than stock" - if that could be found it might shed light on the stock spring rate - which may of course differ between V8/I6 engines
When I emailed IRO they said the 2 inch coils are around a 175lbs/inch spring rate. The same rate as the 3 inch coils. They should make for a nice ride paired with bilsteins or other high end shocks. They also said the hub to fender is 19.75-20.25 front and 20.0-20.5 rear.
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