The more force you apply to our multi-rate spring the more the rate increases.
03-13 Ram 2500/3500 4X4;6 Lift Height, Multi-Rate Coil Springs; Shot peened, pre-set & Powder Coated; Fitment: 2003-2012 3500 44 Diesel; Fitment: 2003-2013 2500 44 Diesel;California Residents: WARNING Initially it is easy to compress these springs for the first couple of inches. After a certain point, the coils at the bottom 1/4 of these springs begin to touch each other and finally become inactive or dead, which makes the spring stiffer. Carli Suspension 6" Lift, Multi-Rate Coil Springs - CS-DMRC6-03-D For 2010 trucks, we have found that using a Linear rate coil works best with the heavier 4th Generation vehicles, giving a very supple and smooth ride while still keeping performance to the absolute maximum. In our multi-rate springs each coil is spaced differently making them a variable spring rate.