Besides the weight of the trailer, it's important to know the tongue weight of the hitch. By tongue weight, we mean the downward pressure that the coupler exerts on the hitch ball. This weight can change depending upon how much cargo you load into your trailer. Knowing this weight is crucial. If the tongue weight exceeds the recommended weight for the hitch, then the trailer will likely become uncoupled or damage the hitch while in tow.
The solution? You can use a simple bathroom scale to measure the tongue weight. For many types of trailers, just place the scale on a concrete block. Next, set the trailer tongue on the scale and read the tongue weight. You can also purchase specific scales for measuring tongue weights.
After you stop in a bed and bath store to pick up that scale, you'll be heading back to the automotive parts store again for the next towing accessory.