808xBguy

What's the meaning of Progressive Spring rate?

holdstumt

There ya go!

808xBguy

Oh I see.
Also, spring rate. What's considered stiff? I currently have Eibach Sportlines. They're kinda soft. Don't like soft.

holdstumt

Well stiff and soft springs vary from car to car. Weight is a huge factor, and so is chassis stiffness. Like for a 1900lb Toyota AE86 most people run F:8kg/mm and R:6kg/mm, but for a 2800lb Honda S2000 a common rate is 10kg/mm all around...

The Eibach Sportlines have a progressive rate and I have no idea what rate they range from..

Tein S-Tech info is F:3.1kg/mm R:4.1kg/mm with a front 1.7 inch drop and a rear 2.2 inch drop

Tanabe DF210 info is F:2.4kg/mm R:2.7kg/mm with a front 1.7 inch drop and a rear 2.1 inch drop

808xBguy

If the number in kg/mm higher, that means it's stiffer?
Like, is the S-Techs stiffer than the DF's?

holdstumt

Yes, a higher number means it is a stiffer, however, stiff and comfort doesn't really go together. You kind of have to pick one or the other. If you want a best-of-both-worlds, I always recommend the Tanabe. Also the Tanabe are more commonly used on xB's than Tein so you can probably find a couple reviews.

808xBguy

Shoots man. Thanks for the info. It really helped.