The Saab Link Forums - View Single Post - Rear coils spring rates
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Old 08-31-2012, 08:58 PM   #4
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Join Date: May 2009
Location: Southern Georgia
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Before reading that article I was guessing 200-300 lbs and it appears to back it up.

I def agree with Bob though on seeing where you are and going from there...

Also found this:
How do you measure spring rates: Grassroots Motorsports forum: Grassroots Motorsports Magazine


Spring Rate = GD^4/8ND^3

G=Torsional Modulus for Steel = 11.25x10^6

D=Wire Diameter in Inches

N=Number of Active Coils

D=Mean Coil Diameter in Inches

8=A Constant for all Coil Springs

Copied from another forum. Didn't 'fact check' this."
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