Had the RPG's 2.25" on for a week on my 2018 now and it is a little stiffer than stock. Totally livable for me.
I don't have stock measurements but as it sits now its with 40 miles till empty on the gas tank.
From ground to fender
Driver front 41 1/4"
Pass Front 41 5/8"
Driver Rear 42 1/8"
Pass Rear 42"
Adjusting preload changed your spring rate?