Originally Posted by Sublime
Found this about 5100's being a digressive shock!
"The shocks feature vehicle specific split digressive valving…..”
What's the split digressive mean? (compression/rebound?)
The 5125s just say they have deflective self adjusting valving……can anyone elaborate? That would be different than the 5100’s? I can feel a difference now that I have them on. The rear end feels a little less stable (the shock compresses easier) but my rear springs have softened up to some degree!
Also, anyone running the 5165’s? These things look mean and have the stem top already. Wonder what the measurements are on the 10” travel ones and if they would work well with the 3” AllPro leafs I’ve got my eyes on!
Split digressive valving is a fancy way of saying that a digressive piston is being used and the valving is not 50/50 but actually split (usually more rebound resistance than compression). In a digressive piston design, the shocks dampening capabilities are felt more rapidly because the piston is concaved and the shims are slightly bent (preloaded) into the dish shape of the piston. The benefit to this over using just heavier grade shims is that the dampening response is felt much quicker but the max yield doesn't really change. So it's sort of a way to get more performance out of the same shock without using thicker valving shims.
Self adjusting deflective valving is pretty much standard issue in any decently made after market shock (sway-away, fox, etc.) Not really special unless your compairing it to bone stock car shocks. It's essentially like the digressive shock described above (uses a piston with multiple shims stacked in a pyramid on both sides for dampening) only the piston is NOT
digressive (concaved). This is known as linear valving. Some companies tend to use digressive valving while others use linear. Typically the digressive valving will have a firmer feel to it and is considered more advanced. Both designs have their purpose so pick your poison. Icon
shocks are digressive which is why many people talk about Icons having a firmer ride than some other brands.
Hope this helps...