I have a class B. In Texas, 26,000 lbs is the point where a class B is required. The gray area comes into play with an RV, where the requirement is questionable.. some say it is required, some say it is not. I felt why take the chance, and got the class B. I did not want to be involved in an accident, and have some ambulance chaser bring a law suit saying I was not qualified to operate the vehicle.