Trailer hitches are divided into five categories based on the weights they can tow and support. They are rated by Gross Towed Weight (GTW), which includes the weight of the trailer and all cargo. The tongue weight is the weight that rests directly on the trailer hitch. The hitch classes are listed below, along with their weight limits and vehicles that are recommended for each class.
It is very important to note that the rating of the trailer hitch is only part of the equation. You will only be able to tow as much as your vehicle can pull, regardless of the hitch you install. Your suspension, transmission, and braking systems all have an effect on how much you can tow. You should always follow the manufacturer’s recommendation in your owner’s guide when towing any size load.
Class I – Light Duty
Max GTW: 2,000 pounds
Max Tongue Weight: 200 pounds
Recommended for: All Vehicles
Class II – Medium Duty
Max GTW: 3,500 pounds
Max Tongue Weight: 350 pounds
Recommended for: Mid-size cars and larger
Class III – Heavy Duty
Max GTW: 5,000 pounds
Max Tongue Weight: 500 pounds
Recommended for: Mid-size trucks, SUV’s, full size cars and larger
Class IV – Heavy Duty
Max GTW: 7,500 pounds
Max Tongue Weight: 1,000 pounds
Recommended for: Mid-size trucks, SUV’s, full size cars and larger
Class V – Extra-Heavy Duty
Max GTW: 10,000 pounds
Max Tongue Weight: 1,200 pounds
Recommended for: Full-size trucks, vans, and SUV’s
The trailer hitch classes listed above were developed by the Society of Automotive Engineers. More information on their standards can be found at the SAE website, http://www.sae.org/.