Originally Posted by JusticePete
The ideal height with 20" wheels is 660mm front and rear. Set the fronts to 16 off full hard. Set the rears to 8 off full hard. Be sure to have the shop watch the video for pre-load and bench setting ride height.
I watched the video and respectfully disagree that "Hand tight" is the best method for setting preload. I prefer starting from zero preload (first point from which the spring has no vertical movement) and then use a set of calipers to set the amount of preload. This way is much easier to repeat with accuracy.