I have noticed a fair number of people finding my little corner of the blogsphere by searching for “getting a tire off of a GEO Metro” or “hammer as tire removal tool” or “brute force VS. explosives in tire removal”.
Before any of you get too involved with an ATF investigation while upsetting your neighbors, let me assure you it IS possible.
The person at the Midas™ shop to whence I took my ailing Metro said that sometimes the rim on this model will rust around the center, causing it to stick to the suspension:
He figured my WD-40 soaking and driving it to the shop loosened it sufficiently to facilitate removal.
Personally, I still think the car was laughing at me.