I tow a 40' flatbed w/vaccum over hyd. disc brakes hauling a 70hp tractor and 15' flex-wing mower. I gross out between 23K & 26K depending on other equip. I haul at the same time. I'm pulling this load with a 2000 F350 Powerstroke dullie auto with these mods: Superchips programer set at 110HP, 4' exhaust , K&N, gauges, & extra tranny cooler. My truck handles this load well but like "gwhammy " said earlier good trailer brakes make all the differance.