I'm no expert but I'm thinking spare for sure. I've never heard of people putting them back on.
I havnt either? It really dosnt matter being I dont have the lug... It was left as an offering to the desert Gods. LOL I didnt rip it apart. I got that tire in trade with 3 others that are in good shape . Im just so darn cheap i didnt want to get another one unless there was no way to get by.