Abstract: A track assembly for a pull-out member, such as a drawer for a piece of furniture or an oven tray for cooked food, includes a stationary guide rail, a runner slidable with respect to the guide rail in an operating direction between extracted and retracted positions and coupled to a pull-out slide member, and a spring-biased brake mechanism mounted transversely to the operating direction of the runner and bearing upon at least one flank of the runner, to thereby impede a smooth run between the runner and the guide rail of the track assembly in cases in which a certain degree of sluggishness is desired.