Here is the skinny. I have a 2014 RZR800XC with Walker Evans Shocks. From the Factory they come with .5 Inch preload on the front spring and 1.0 Inch on the rear. The max adjustment is an additional one inch. That came right from Cody at Walker Evans. Measure the distance between the top of the collar and the bottom of the red cap at the top of the shock. Max proload is 1.5 inch on the front and 2.0 inches on the rear. And That's the rest of the story.