Tires question

I had used BFG tires on most of my vehicles, but have had separation problems as of late. My last set of BFG TA commercials had only 23k miles before having problems. Two fronts started to separate at the worst time Saturday night going through Atlanta had to replace with pair of Westlake all I could find on a sunday. The rears didn't last much longer which I replaced with good year wrangers. The BFG were 3.5 years old at the time of problems. The truck is also stored inside unless traveling.