what does weight distribution hitch do
Tongue weight is the portion of the trailerâs weight that pushes down on the hitch (usually between 10 and 15 percent), plus the weight of the part of the tow vehicle to the rear of its back wheels. Cargo in the tow vehicleâs trunk therefore increases tongue weight.f the trailer weighs half of the tow vehicleâs weight or more, a weight distribution hitch is necessary. For some trailers, weight distribution may also be required by law. These hitches do not mean that the driver no longer has to keep the trailer balanced, nor do they increase the maximum weight a vehicle can pull.