The custom Load King 503-755-DD-MB is another one of Load King’s detachable gooseneck trailers. Similar to the 503-705, this gooseneck trailer has a drop deck that is used with a mechanical booster; however, the 503-755 gooseneck has a 75-ton load capacity in 12′ load concentration at 60 miles per hour. This gooseneck is also built with 100,000/80,000 PSI yield strength steel construction, made to last.