a substantial portion of the tire 36 thereby preventing disengagement by simply lifting the tire 36 out of the chock 10 in addition the fenders 66 may be equipped with side walls 68 that prevent a would be thief from tipping the chock 10 on it 39 s side and slipping the tire 36 out from the top portion of the chock 10 and the fenders 66 alternatively a chain may be added to tether the chock 10 to the aircraft 50 if chain damage is not a concern or if the aircraft 50 employs wheel covers in another similar embodiment the forward 20 and the rear 30 chock halves are equipped with handles or other transportation aids to facilitate installation and removal of the apparatus in still yet another related embodiment the fenders 66 are capable of selective interconnection to the chock halves 20 amp 30 removable fenders 66 will facilitate transportation and installation in addition one skilled in the art will appreciate that fenders 66 either fixed or detachable may easily be adapted to be used with a plurality of tire 36 diameters referring now to fig1 another embodiment of the present invention equipped with foldable fenders 66 to facilitate storage is shown herein in order to decrease the vertical profile of the chock 10 the fenders 66 may be hingedly interconnected to the chock halves 20 amp 30 preferably.