A Ford F250 arrived in the shop today for a vibration concern. Tech A. J. verified the concern and pulled the truck inside to investigate. He traced the problem to the tire seen in the photo above. Everything looked ok from this angle.

Oh !

Nobody knows for sure what happened. But somehow, a giant bubble appeared on the inside sidewall of the RF tire.

I don't know if this was some kind of impact damage, or just a problem with the layers of the tire. Either way, the tire still held air at this point.

This tire was done and had to be replaced.