Rear Mud Flap Assembly with Steel Bracket for SHACMAN Dump Trucks Rear mud flaps on a loaded dump truck take more punishment than the front ones, so we sell this as a complete assembly: rubber flap, steel hanger bracket and the bolts to fix it. It replaces the bent and rusted bracket that most F3000 and X3000 trucks end up with after a few seasons in a quarry or on a construction site. The flap is 4 mm rubber, wider than the front version, and the bracket is 2.5 mm steel with