A-18305-ER spare wheel and tire lock assembly. (For 30 x 4.50 tires.) Replaces A-18305-AR spare wheel and tire lock assembly which has been obsoleted. This part is the same as A-18305–AR except that it does not have the cylinder included. When this assembly is installed, it will be necessary to include an A-46123-E cylinder and fit it to the ignition lock key if the key is the type which will fit this cylinder. If not, the dealer will make a key and fit the cylinder to it.