i run a half ton frame, i prefer the flex and it helps it hook with my slightly shorter wheelbase. havent had and issues with bending or cracking for over 5 years now. front is stiffened for weight box but thats bout it. keep in mind im pretty stripped and pull a drawbar. if your reese style like my old stock truck i prefer the heavier one ton frame to keep ridgid. work stock with no front weights and a factory hitch, rear does most of the pulling with less than half the help of the front. keeping it stiffer helps keep front down at the same time helping transfer better weight to the rear to hook!