3100# of slate and cement on the back of my truck was like a fly had landed on it but i have a 3500 drw C&C so it's a little beefyier, didn't even hit the helper springs, still managed to beat a toyota truck who stood on it when he saw me up the dual lane onramp as i didn't wanna test the braking system when he did the usual slam on the brakes at the merge point