2001 LEXUS RX Tires Problems

225 / 70 R 16 A tire shop inspected my tires and said that all 4 of my belts are separating and indicated to me a convex shape that peaks in the center of the steel belt. These tires were purchased new some years ago when they were balanced, struts replaced, and full alignment, yet at speeds 55+ the car made a vibration that no shop was able to identify. Yesterday I hit a nail in the center of the tread, but it punctured in a very uncharacteristic way. This prompted me to take it to a tire shop where they said "I've not ever seen something like this before where the belts are separating on all tires like this." I drive ~12K miles per year in residential areas and have kept my tires at 31psi. Out of curiosity, I looked online for recalls and found this same tire (but...

vehicle parked, came out next morning, tire had 5" split on sidewall, completely deflated original purchase date 12/11/21 tires have 5320 miles on them from new tire sidewall failed 5/15/2023 tire size 225 70R 16 mastercraft courser HSX tires available for inspection upon request

CONTACT STATED THAT SHE WAS DRIVING ON I-495 @ A SPEED OF 60 MPH ON A SUNNY DAY. HER TIRES BLEW OUT ON HER THIS WAS ON THE RIGHT PASSENGER SIDE. THE ENTIRE TIRE CAME OFF THE RIM. THE CAR HAD TO BE TOWED TO THE DEALER WHERE A NEW TIRE WAS PURCHASE. THE OLD TIRE WAS LEFT AT THE DEALER. SHE NEED TO KNOW WHY HER TIRES JUST BLEW OUT HER. WILL SOMEONE CALL HER TO FIND OUT WHAT CAN PREVENT THIS FROM HAPPENING AGAIN.