For most trailers it is recommended that you load the trailer so that your tongue weight is within 12% to 15% of the Gross Trailer Weight. (Boat trailers sometimes recommend as low as 8%) Too little tongue weight can cause tracking problems and contribute to sway. Too much tongue weight can overload receiver and hitch ratings also causing greater problems. If you need help regarding how to load your trailer properly, a trip to your local dealer can be most educational. Loading the trailer correctly can lend to good overall trailer stability while towing.