US Patent 10207744 Stowable tractor mud flap

Drag reducing systems for tractor-trailer combination vehicles are provided. In one aspect, a drag reducing assembly generally includes a stowable mud flap rotatably coupled to a mounting bracket and a linkage. The linkage is configured to transition the mud flap between a first, deployed position, to a second, stowed position. The mud flap is generally positioned adjacent a wheel and tire of the vehicle, downstream of airflow. In the first position, the mud flap may be deployed at an angle of about 90° to the ground. In the second position, the mud flap may be stowed at an angle of about 90° from the first position.