I use a 16 ft. open trailer for my equipment that has dual axles. It still has the original tires that came on it. I'm not too worried around town and in the neighborhoods but sometimes I worry when traveling on the freeways at high speeds. I just don't trust the tires supplied by most trailer manufacturers as being the "best". Are there any "heavy-duty" or premium tires for trailer use? I have heard that you shouldn't use auto tires or radial tires on trailers. Is this true? Thanks for any help. Cleve.