I picked up 3cu.yd. of decomposed granite and the loader dumped it near the back of the trailer.(behind the axles) Sure enough im driving down the road about 65mph and that SOB starts to wobble back and forth. I let off the accelerator and slowly tried to slow down while fighting the sways. By the time I slowed to about 30, my tires were squeeling with each sway and im taking up 3 lanes and about to eat it. I finally stopped and discovered a flat tire on the trailer and about a yard of granite spread over 3 lanes for 1/8 mile. When I got to the site and unhooked the trailer, it was so back heavy it sprung up when I unhitched it and sat on its rear. It scared the crap out of me and made me realize that I need to be more careful. Anyone?