You probably saw this on their website: "Are you an R.V. owner? Do you own a truck/van used for recreational purposes such as towing a boat? Are you looking for a smoother ride and want to dampen road noise and shock? Is your rear suspension not a leaf spring pack? Do you take your vehicle over rough terrain or off-road? If so, it sounds like you should check out SumoSprings."
https://www.supersprings.com/products/sumosprings/
Not sure I would consider this a necessity but I will be interested in how they work for you if you decide to go ahead. Nancy
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