These trailers are designed to haul and feed 3 round bales or 2 larges square bales. They are constructed with a 2" pipe frame with 3/4" pipe slant bars. The running gear is a 6 ton wagon axle with 4 new wheel and tires. The tongue pins up out of the mud and out of the way. The trailers have a rear hitch so that two trailers and be pulled in a row.