So as I am reasearching into what coil springs I will use when I do my leaf-to-coil swap, I've come upon these two types of springs.

An example of each:

Linear: http://broncograveyard.com/bronco/i-..._coils_5__.htm

Progressive: http://www.cageoffroad.com/product_d...d=34&itemid=65

I initially was liking the progressive rate coils as they seem to be similar to a coil-over setup, with the two different spring rates. But as I read on, it seems that perhaps a progressive rate coil isn't as good in comparison to a linear rate coil?

Anyone who can add info/insight would be great!

 

I am not sure about rates...

but they said 23.5" in length out of the truck. my 5.5" XJ coils were 22"

I have not noticed any sag yet.

 

I'm using 17" long (uncompressed), linear, 1979 F-150 4" lift springs. Seem pretty compliant and I've got adequate flex for this build of my truck. Nice ride.

I don't know enough about progressive rates to even comment. I'm not sure for instance what they would do for my setup when I'm happy with it already.

 

Thanks John..

And Zach, it would appear the RE TJ coils you're running are linear as well.

I'm going to ask around some local guys and see if I can get any kinda of decent answer.