Abstract: A bowling ball which has six weight receptacles arranged such that one receptacle is at the intersection of each of the mutually perpendicular X, Y, Z axes emanating from the center of the ball and the outer surface of the ball. A poly-vinyl-chloride cylinder lines each of the receptacles and inserts of predetermined weight can be inserted in various combinations into the receptacles. The weight receptacles are positioned in the ball such that one of the receptacles lies substantially equidistant from the finger holes of the bowling ball.