Quote:
Originally Posted by Hierlevelz
Is it safe to say that a progressive spring like Eibach Pk's will "sag" and be "softer" overtime beacuse of its progressive nature as opposed to a linear spring like Swift Spec R's? I am having some wheel fender clearance issues and my thought process is if I swap from Eibachs to Spec R's I can regain some additional ride height and alleveiate my rubbing issues. Swift does market their spring as having a 1.0"/0.8" lowering height front to rear on the 335i vs. Eibachs 1.4"/1.0".
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what you say about progressive springs may be true, however in the case of Eibach pro kit, you may be surprised to know (as I was), that they are in fact LINEAR.
Check out this thread. Eibach reps join the thread to answer questions and I asked them about progressive or linear. Posts 11 and 12.
http://www.e90post.com/forums/showthread.php?t=959982
Before this thread, I called them on the phone, got the same answer: LINEAR. Still, for some reason I didn't believe it
D's Bimmer also confirmed this with respect to pro-kit springs used with the Bilstein B12 kit.