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Originally Posted by brp987
'01 S on Eibachs before ROW M030 install.
ground to fender: front: 24 3/4 inch, rear: 25 inch
coil wire diameter at bottom:
'01S (stock): 0.514 inch; Eibach: 0.514 inch; ROW M030: 0.545
Apparently, spring rate varies as 4th power of wire diameter, which according to my math makes the row M030 26% stiffer than what was stock on my car.
I'll try to post pics, but this is my first try so it probably won't work.
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Spring rate also depends on spring pitch (coils per inch) when unloaded, spring (coil) diameter, and material, of which there are many. So there are missing puzzle pieces.
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