drsteve, I am sure glade I knew nothing about Mission Tires, or saw that post about the Mission tires. I was definitely concerned about it blowing, but only because it was never on the ground and never flexed, or heated up or do what tires do, not the fact there was a major recall several years ago.
It looks like Keystone and who knows who else took what ever Mission tires they had in stock and used them for spares. So I think the moral of this story, you should at least look at the spare and see what brand it is. Spares have a different rim, as mine are aluminum rims on the rig and the spare is mounted on a white spoke wagon wheel, so you would never rotate it with the rest and I don't think anyone rotates their trailer tires anyway. And who buys and replaces a spare tire. So then maybe the moral of this story is do not look at what brand or make of spare you have, just hope it holds up if you need it to get to where you are going.