The spring rates used by the factory and the aftermarket have trade offs. According to AEV there are a number(26?) of different stock spring rates on 2500/3500 trucks.I suspect that is true,even though I have read many statements on CF that the spring rates are the same in 2500/3500.I doubt my 2500 SWB has the same rates as a LWB dually with snow plow and 5th wheel hitch options.
How many spring rates does Carli and Thuren offer? One,as I remember it,2500 and 3500 get the same rates,a trade off.
Thuren says their coils are 26% softer than stock,Carli told me on another forum that the spring rate information was proprietary (how much of a difference can there be?) the Deaver leafs are softer than stock as well,another trade off.
It would be nice to see a camparo of AEV,Carli and Thuren trucks on the dirt roads of Death Valley.I suspect empty trucks would favor Carli,and Thuren,when payload is increased I suspect at some point the stock springs would start performing better than the softer sprung trucks.I would like to know at what cargo load the stock springs perform better than softer springs.
I don't care about running an empty truck fast across the dunes,I haven't seen any videos from AEV, Carli or Thuren with loaded trucks doing real world,at least for me,driving.
If those videos exist please give me a link.