Here is a good explanation: A frame mounted Class III or Class IV receiver hitch is mandatory for safe hauling, and is the only hitch that is legal in all states. This type of hitch is bolted or welded to the frame of the tow vehicle and has a square receiver for a slide in ball mount. The ball mount itself can be purchased with the proper drop so the trailer travels absolutely level. (A trailer that is not level will not travel properly and may sway or wear the tires unevenly because the tongue weight of the trailer will be compromised. There is also a likelihood that the trailer can pop off the ball. The horses inside the trailer will find it hard to balance which can cause trailer control problems and extra stress on the horses.) Each part of the hitch should be rated to match the GVWR of the trailer. For example, if the trailer has a GVWR of 5000 lbs., the hitch, ball mount, and ball must also be rated at least 5000 lbs. The entire rig is only rated as much as its weakest link! A ball that is mounted on a "step bumper" of the truck does not distribute the weight throughout the tow vehicle and it is not adjustable. Federal Motor Carrier Safety Regulations do not allow a trailer weighing 5000 lbs. or more to be towed by a ball on a step bumper. The rating of the hitch will be imprinted on the hitch itself. There are two classifications of ratings: "Weight Carrying" determines the maximum weight the hitch can support with the weight of the trailer carried only on the hitch without weight distribution bars. "Weight Distribution" rating determines the amount that can be safely accepted by the hitch with weight distribution bars. Both ratings will be stated on the hitch. The ball and ball mount will also each have the weight rating imprinted in a visible place. Weight distribution bars, sometimes called "stabilizer bars" or "equalizer bars" distribute the weight of the trailer and tow vehicle throughout the entire combination. When the tongue weight of the trailer rests completely on the rear of the tow vehicle, it can lift the front end of the tow vehicle. The weight distribution bars prevent this from happening. They also increase the GVWR of the hitch. They are very important when towing with a downsized vehicle, a vehicle with a short wheelbase, or a long trailer. Weight distribution bars can only benefit your situation. Weight distribution bars differ from a "sway bar". If there is a need for a sway bar, there is something wrong with the trailer that shouldn't be happening such as uneven tire pressure, suspension problems, or an unlevel trailer. Copied from Bickford trailer sales web site. |