A brush assembly for an automotive car wash having a drum adapted to be rotatably driven about an axis. The drum includes a plurality of elongated and circumferentially spaced cylindrical channels around the outer periphery of the drum and each channel includes an elongated slot open radially outwardly from the drum. An annular and cylindrical bearing sleeve is positioned within each cylindrical chamber while a brush has a retainer with a cylindrical boss along one edge which is then slidably inserted within the retainer thus securing the brush to the drum.