Adding these to all 4 wheels on my CTC. It is a about the handling and these trailers have relatively poor suspensions and loaded down, they are worse. This should make a HUGE difference with sway, handling and etc., especially fully loaded with water tanks full and toys on board. Decided to do this now as I am headed out West late next week and it is a long haul from Florida fully loaded. The existing springs are almost flat and this will preload them and give me a little more travel. I am going to add these from the very start on my 6x12 build when I receive the trailer. I will have to move the axle to the other side of the springs (overslung) like I have already done on the 7x18. It will also lift the trailer which I want for off-road clearances.
I added something similar to the F250 before my SC trip and it was a very noticeable improvement for bounce and sway under load and hauling.
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