* The type of trailer: Enclosed trailers can typically hold more weight than flatbed trailers.
* The construction of the trailer: Trailers made with heavier-duty materials can hold more weight than those made with lighter-duty materials.
* The axle rating: The axle rating is the maximum amount of weight that the trailer's axles can safely support.
* The tire size: The larger the tires, the more weight the trailer can safely support.
In general, a twelve foot trailer can hold between 2,000 and 5,000 pounds of weight. However, it is important to consult with the trailer manufacturer or owner to determine the specific weight capacity of the trailer you are using.