bagging my dually

On my dually I used 2800lb bags over the axle and it could tow a house with no problems,but I did a flip kit,shackles and hangers and kept my leafs...Before that the truck had juice in it and towed a two car trailer...I know of guys towing using 2600lb bags and 4 link so I think as long as you keep the bags over the axle and figure how much weight your towing ,just buy a bag that can match your towing needs....