See also:

Uniform tire quality grading
DOT (Department of Transportation) Quality Grades: All passenger car tires must conform to federal safety requirements in addition to these grades. Quality grades can be found where applicable ...

Trailer brakes
If your trailer is equipped with a braking system, make sure it conforms to federal and/or local regulations and that it is properly installed. Never connect a trailer brake system directly ...

Maximum Gross Vehicle Weight (GVW)/Maximum Gross Axle Weight (GAW)
The GVW of the towing vehicle must not exceed the Gross Vehicle Weight Rating (GVWR) shown on the F.M.V.S.S./C.M.V.S.S. certification label. The GVW equals the combined weight of the unloaded ve ...