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@Chopstix Kid Is everything factory? If so, I would start with the preload adjustment in your owners manual. If I looked at the correct manual (2018 RZR XP4 Turbo?), it's on page 151. It tells you how to adjust the preload to "keep the shock in the optimal zone and maintain ground clearance" for additional weight.
Good post.

The more I go down the suspension rabbit hole, the more there is misapplication of nomenclature with a stock set up.
 

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No doubt. I took off down that same rabbit hole before I thought twice about it. LOL
For a stock set up:
The tender is actually a helper to maintain the gap of the main spring at full shock extension. It is a single spring rate system.

Yes, the shock provides some resistance to the machine weight but will not support it without springs.

For stock. Think of the main spring as a solid entity. All you are doing is moving the "perceived" hard stops of the spring. IE shock has 18" of travel. "Solid mass of spring" is only 10". Where you place that in the system will be your ride height.

If you go the full 18" of extension and occupy that with spring, then start compressing the spring down to 6" between hard stops you get into rates. Think of a captured recoil spring in a firearm. it can only travel X distance. A firmer spring will slow the motion down.

Forgive me if I am not making sense. Jacked up on allergy and cold meds.
 
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