381.5 ton I run 40 pound all around in my 51 6400 98 inch wheelbase pickup 11,000 miles since heavy duty 4-link with 7/8 inch heim joints was built and installed at home. It's the best use of an outdated farm truck I know of,little boys really go for it and bigger ones often say "hows that ride" Well on smooth road is fine chuck holes and uneven road still have bump steer. AD trucks are not interstate mobiles !!