The bicycle hub assembly includes a hub axle, a hub body, a bearing unit, a lock member, and a tool engagement member. The bearing unit is configured to rotatably support the hub body around the hub axle with respect to the rotational center axis. The bearing unit includes an outer race, an inner race and a plurality of rolling members. The lock member prevents the inner race of the bearing unit from rotating relative to the hub axle. The lock member has an outer peripheral surface. The tool engagement member is configured to rotate the inner race of the bearing unit relative to the hub axle. The tool engagement member has an inner peripheral surface. The inner peripheral surface of the tool engagement member is disposed radially outwardly relative to the outer peripheral surface of the lock member.