A bearing assembly for bicycle connected to one of two ends of the head tube includes a first race having a skirt portion and a groove defined in an inner periphery of the skirt portion so as to receive beads therein. A second race is engaged with the skirt portion and positions the beads in the groove. An insertion extends from the first race and includes threads defined in an outer periphery thereof. The head tube has two inner threaded sections defined in an inner periphery in two open ends thereof and the insertion is threadedly engaged with one of the inner threaded sections of the head tube.