mgproudfit
Member
The spring rate.
14” TRD is a 600lb spring
14” Eibach is 650lb and also comes 700lb
There is more to it than just length.
Is there some formula to calculate the varying amounts of lift on a spring-rate basis? I installed my setup with the Dobinsons TRD PRO 1" spring (same length as supplied TRD FJ spring but only 518lb vs. 600lb). I do wish the front was a bit higher than it is and would like to know how much it *might* increase if I swap the springs out.