Joined
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10,736 Posts
I agree with dave, 2x4 is over kill. I do mine with 2x2 220wall and its as strong as you could want it. I have slamed mine really hard a few times and only sightly tweeked the outer tube portion in one spot right in the center which could be prevented with a thicker tube there or another support to the sqaure tube. dogonmut could verify this as he saw me slam it into the rock and about bust out my teeth. I dont think your really going to have a problem with the frame tearing from the sliders as it will hit the body and distrubute the weight before the frame has enough flex in it to acually rip or bend from the slider.
here is my mounting
here is my mounting

