Abstract: A mud-flap supporting assembly for mounting a mud-flap on a vehicle including a horizontally disposed arm with a mud-flap attached to it. The arm is mounted for pivotal movement about a vertical pin, and a coil compression spring is provided operatively connected between the arm and an arm portion which is moveable with respect to the arm, for centering the arm so that it is normally in a first position but may pivot against the bias of the spring about the vertical pin out of the first position and will be returned automatically by the spring to the first position. The arm portion includes a first portion fixed to the arm, and a second portion slidably moveable with respect to the first portion, and guided by the first portion, the first portion being deformed to provide a stop to provide the limit of travel of the second arm portion.