I had got these spares awhile back. I froze them after a meat shopping quest as soon as I got home. After thawing them I open em up to proceed with the rub. I flipped them over to remove the membrane when I noticed something real peculiar about them. There wasn't much bone and a lot of meat. Then I noticed the size of the bones. These look like baby backs cut like a spares. Either way they look really good and I'm going to eat them like there's no tomorrow!