Each Bones Race REDS Bearing is made with upgraded top quality bearing steel, ground to perfection and polished, best for racers who use precision trucks and properly tighten their axle nuts. Precision ground extended race eliminates the need for speed washers, and provides better alignment of the bearings when the axle nut is tightened. A groove on the inside of each of the Bones Reds Race bearings inner race eliminates weight and allows insertion and removal of the bearing using the Bones Bearing Tool, even on hub wheel.