Class 1: 100 lbs tounge load 2000 lbs gross trailer weight Class 2: 300 lbs tounge load 3500 lbs gross trailer weight Class 3: 500 lbs tounge load 5000 lbs gross trailer weight Class 4: Depends on the manufacturer. Could be 8000 or 11,000 lbs gross weight Jay -- myjunkbox at rogers.com <myjunkbox at rogers.com>