CURT Class 4 Trailer Hitch for Dodge Ram, Ram 1500When an especially bulky trailer or heavy load requires more towing power, the Class 4 steps in to take the reins. CURT Class 4 trailer hitches are made with all American steel and get their strong designs from the ingenuity of our talented engineers. Class 4 trailer hitches boast a gross trailer weight capacity of up to 10,000 lbs. and a tongue weight capacity at 1,000 lbs. Also, like Class 3 hitches, Class 4 hitches can be used in combination with a