My car originally came w/a standard steel 15" spare. I have a ralley rim, though, now for the spare, but the hold down hardware (hook, jack stand plate) for the steel rim doesn't seem as though it would work on the ralley. What was used for ralley spares?
Are you mounting the rim upside down (back side) towards the bottom of the trunk? The hardware is all the same but the rim is front side down all the models.