I rarely get on here, so if someone asks me a question back, no offense I probably won't see it. There are so many variables to this question, there is no hard and fast answer that will apply to all situations . Minimum sag I would say is 30%,-35% @ ride height. On bigger offroad stuff with dual shocked corners with a c/o and bypass can and usually do run more as they have more gross damping.. The spring preload #'s given earlier are relevant to a certain point, but as stroke grows, the parameters grow as well. But as a principle, yes, the amount of preload to attain a certain sag % is a good indicator as to whether it is sprung correctly or not, and if not which way. We get a lot of stuff that comes into our shop to get redone on a weekly basis, from customers who already had their stuff done at at other shops and or individual out on the sand, with lackluster results. Some of the set-ups from name brand shops are real head scratchers.
