LOL!! Sorry, I have no idea what you just said. What exactly are you seeing here and can actually tell that something is properly engineered? How exactly does this make it better?
Im basing it solely off the photo (and not pro MC per se, just using them as an example since they are the topic at hand.)
As stated earlier, a dual rate coil will generally have less "road rate" coils than a single rate coil (like an evo.) For a dual rate coil (lets assume the road rate on a dual and a single have the same physical spring rate) to be equal to in ride feel to a single rate, it must be physically taller.
If we take a 5000lbs JKU and two sets of coils...a dual and a single...and lets assume we get 1.5" of compression at rest under that 5000lbs....the dual rate coil will lose more "meat" than the single rate coil, since it has less road rate to begin with....unless the 1.5" was engineered into the coil from the get go, resulting in a taller coil (as pictured.)
So, if the above photo is truly a 2.5" coil on both fronts, you can tell that the MC coil has the "initial sag" built into the coil, which would eliminate the problem you correctly described in other dual rate threads (that dual rates generally ride harsher because they compress under load and lose a bunch of their "road rate."
P.S. I mispoke by saying they are properly engineered...I have no idea if they are or not, and you are correct, I cant tell from the photo. I guess my point would be that for a dual rate to work as it should and equal the ride of a single rate, the coil must be taller, and it *looks* like MC built the sag into the coil, thus, making it ride correctly (effectively like a single rate.) Obviously in this particular case, I am speculating since I don't know the specifics of the spring nor have I ever ridden in a rig equipped with them.
