SAE J2807 test protocols include:
Cooling capability on a long highway upgrade
Launch and acceleration on a level road
Launch and acceleration on a 12-percent grade
Handling performance in terms of understeer and trailer sway
Braking performance in terms of stopping distance and parking brake hold on a grade
Structural performance for the vehicle, the hitch, and hitch receiver
Furthermore, SAE J2807 assumes the following when calculating trailer weight ratings:
Light-duty truck ratings assume inclusion of any options with higher than 33-percent market penetration
The driver and the front passenger each weigh 150 pounds
The vehicle is equipped with up to 70 lbs. of hitch equipment
For conventional towing, 10 percent of the trailer weight is on the tongue