Coil Spring Source and calculator.

[RhinoDave]

I'm pretty sure this information has been posted before but it's buried pretty deep by now and since there has been some discussion on shocks and springs, I thought it might be worthwhile to repost. When I bought my six way swinger I was pretty sure the 300 lb spring that came with it wouldn't be heavy enough(I'm 200 lbs). After a little research I found Phat Tire to have a good selection of springs at a reasonable price and bought a 400 lb spring. http://www.phattire.com/frresuresp.html
 To figure out what spring I needed I used the following calculator. It seems to work out fairly well but you still need to take into consideration on what your own ride preferences are.
http://www.tftunedshox.com/springcalc.htm

[jimbo]

This is cool.  5th Element took down their spring chart from their website so at least we have another source.