Typically manufacturers and resellers will suggest you should calculate the winch rating by taking the gross vehicle weight and multiplying it by 1.5 and that would be your minimum winch size.
The permitted gross vehicle weight and maximum permitted axle weights of a goods vehicle are marked on either side of the vehicle.
NHTSA proposes to require a more stringent endurance test and to add a new high speed test for several heavy load range tires for vehicles with gross vehicle weight rating of more than 10,000 pounds.
