Design your own Dual Spring-Rate Coilovers
#61
Nordschleife Master
Exactly. That upper pic is not a dual rate spring setup, it just has helper springs to keep the main coil springs in place at full suspension travel....
I have Eibach helper springs on my cars and they are very thin flat springs that you can compress with your fingers. Those look like much thicker flat springs with an actual spring rate.
Helper spring, rate negligible.
Regular flat spring (dual coil, triple coil tender, etc).
#62
Pro
I did some additional research, and yes, actually, that is a tender spring according to Eibach's web site, hot a helper spring. I'll update my post. Thanks for the clarification, now I see where to find info on this.