4 place sled trailer with 5 sleds , 4 guys and all our beer and gear. The truck squatted pretty good , about halfway down. It road great and handled the load great. Doing 75 against the wind i was getting 7 mpg. But other than that all was fine. I would never have tried this with stk springs. Pretty sure id be dragging a bumper and bet sitting on busted springs. One other good note is the truck seems to ride better now , i think the springs got worked out well and they are softer now.