Abstract: A cover plate with a center cap is placed over a wheel installed on a truck trailer. A tang on the cover plate, located on the side facing the wheel, passes through a slot in the wheel. The plate is then rotated until the tang touches a wheel spoke, and a projection on the tang extends under the wheel spoke holding the tang to the wheel. A slot on the opposite side of the cover plate overlaps another slot in the wheel. A flange attached to a chain is passed up through the wheel slot and the slot in the cover plate. The chain flange is then secured in place by a padlock attached through an eyehole in the chain flange. An identical installation is made on the tandem wheel using another cover plate and the flange on the other end of the chain.