I bought the Eiback and used the 1.7 setting because I didnt want to preload the spring too much. I also used a 3/4"" spacer on top of the spring. my over all lift was 1 3/4"". the ride wasn't much different on the road I really couldn't tell any as far as stiffness. Ill sure next week with the bigger tires I should tell a difference. easy swap about a 2hr job. would be easier with spring clamps, I would recommend renting a set from autozone or some were.