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How about a bit more info for the uninformed out here. It looks like 2 separate springs, is the crossover ring what is separating them and does that slide up and down the shock making the 2 springs work as 1? Is this what you were talking about when you previously referred to a compound spring or dual rate or something like that? Are those stock shocks valved and re sprung or a different shock altogether?
 

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Yes it is refered to as a dual rate setup. Two springs with a slider in between. The springs act as one until the slider hits the crossover ring and then then shock uses the lower spring only. When both springs are active the spring rate is calculated thus:
(S1 X S2) / (S1 + S2) .

With this setup shown you can adjust where the springs transfer and is the preferred method of dual rate. Most UTV Dual rate setups the sliders needs to bottom out on the top spring retainer to transfer. You can only adjust by changing the preload, the length of the top spring or the length of the slider top coller.
That clears it up pretty good. I take it the crossovers are the 2 rings inside the short spring and are adjustable just like the preload locking rings. Looks pretty trick and seems like it should work similar to the high speed and low speed compression adjusters on the shocks (at least after ours are revalved).
 
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