You can adjust the preload and the height, top lock ring is for preload only, Meister set this to about 10mm of preload when they assemble them. Reducing the preload softens the ride and allows a bit more roll. Best way I found to measure the preload is to undo the top ring until the spring just rests on it but has no play when you try to move it by hand up or down. Then move the other lock ring to sit with the top on but not tight. Then add preload until the gap between the two top rings is whatever you want, 5mm, 10mm etc. My happy medium was 5mm gap. Once you've set it then do the second ring tight with the top ring. Hope this makes sense and I hope it's helpful!