[j.d.roost]

Here are the ae spring rates.

12mm Front Spring, brown, 2.85 lb
12mm Front Spring, black, 3.00 lb
12mm Front Spring, green, 3.15 lb
12mm Front Spring, white, 3.30 lb
12mm Front Spring, gray, 3.45 lb
12mm Front Spring, blue, 3.60 lb
12mm Front Spring, yellow, 3.75 lb
12mm Front Spring, red, 3.90 lb
12mm Front Spring, orange, 4.05 lb
12mm Front Spring, purple, 4.20 lb
12mm Rear Spring, black, 1.90 lb
12mm Rear Spring,green, 2.00 lb
12mm Rear Spring,white, 2.10 lb
12mm Rear Spring,gray, 2.20 lb
12mm Rear Spring,blue, 2.30 lb
12mm Rear Spring,yellow, 2.40 lb

and here is a link with a lb chart
http://www.team-durango.com/pdf/setu...t-Complete.pdf

I am currently running blue front and yellow rear on my 210 (carpet).
Hope that helps.