A device for securing a Chevrolet rally cap to the wheel of an automotive vehicle to deter the theft of the cap. The device is completely hidden from view and consists of a ring which attaches to the inside of the rally cap, cables extending from said ring having washers at the other end. The cables are of sufficient length to permit the washers to be mounted on the wheel stud lugs while the ring is attached to the rally cap. After the washers are mounted then the rally cap is mounted on the wheel rim in conventional fashion, by frictional engagement. The cables remain nested within the cap and are not visible. If the rally cap is pried loose in an attempt to steal it, the cables will prevent the theft and the thief will not be able to remove the cap without finding out first how the cap is restrained and then obtaining a tool to release the cap. This effectively acts as a deterrent to casual thievery.