Use the synergy ones, they are basically the same exact spring...
If you know the diameter of the wire and the diameter of the coil, you can calculate the spring rates.
I don't know how to calculate spring rates based on the bare materials.
I too am looking for a set of rear 3” Nth LJ springs. I have a brand new in the box set of front 3” springs. Just need the rear springs.
Nth Degree is gone. Their website is up. Just a ghost. Nobody is on the other side. Have been gone for a while now. Nth still owes me a set of springs and a few other parts that I will never see along with the cash.
Sorry to hear that. Your the first I've heard that never eventually got their stuff.
Maybe I should set up a site to take people's money for these unicorn springs? I'll re pack the JKS springs and double the price. I can even delay the shipping for several months so buyers feel like they're in short supply and keep the fever up.
(Sarcasm)
Jeez now I got to paint them? That'll ratchet up the price!But the Nth springs are gray...