Inner Diameter of Associated Sedan Springs
#2
Suspended
Measured 3 sets of my associated springs and they vary between 13.2mm and 13.3mm
#6
If your unknown springs are about the same length as the associated springs, you can do a simple test. Put the unknown spring and the associated spring on top of each other, and squeeze them together, the one which compresses fully first is the softer. Could give you a rough idea how hard or soft they are compared to some known springs.
Regards
Neal
Regards
Neal