New wheel bearings are included, and are already packed with Redline synthetic grease. In fact, the inner bearings are already installed in the rotors along with new dust seals. After the rotor is slipped over the spindle, the outer bearing is inserted followed by the keyed washer. The castle nut should be tightened while rotating the hub and should only be taken just beyond finger-tight. Baer stresses not to tighten further in an attempt to align the next cotter keyway as the hub needs the relatively loose fastener torque to allow for thermal expansion. The keyed washer, castle nut, and dust cap are all stock-type parts, though new pieces are supplied with the kit.