could someone explain the difference b/w progressive & linear rate springs?

[drpahjee]

these terms have been coming up on searches although they're really not explained, i think the progressive become more stiff when you have increased body roll, etc. but are supposed to be more "soft" in daily driving whereas the linear springs are "always" stiff, is this correct?

also, of the popular aftermarket tuners (eibach, H&R, UUC, ACS, Racing Dynamics, any others i may have left out) which are progressive & which are linear? (on an e46 330i)

hopefully, this'll be my last post & question before deciding on which springs to go w/

[Gary@Tirerack]

Right! Thats probably the best simple and short explaination I've seen of it. Spring companies normally don't publish their spring rates or whether they're progressive or not, but they'll almost always tell you if you call them directly.

You can check pricing on the two brands we carry H&R and Eibach here :


http://www.tirerack.com/a.jsp?a=BN4&url=/suspension/index.jsp

[FlyingDutchMan]

you'll most likely not like the way progressives feel. I can't stand progressive rate springs, that intial squish is a confidence killer for me setting up the car into a corner.