Hmm. I just got off the phone with American Motorcycle Tire. They're extremely helpful, once you get a hold of them.
Turns out my tires were stolen. They shipped my tubes, weights, etc. in a box strapped to the tires, but some scumbag somewhere along the way decided the tires might look good on his bike and cut the shipping straps. The label on the box shows the correct weight for tires, but the tires went bye-bye. Fortunately, AMT is going to ship me some new ones.
Hope my old rubber lasts a few more days.