Thoughts? You don’t need a spacer for duals. You said it yourself in other words.
What’s the tires size/load rating and what’s the truck and what kind of GYs blew up?
By virtue of the fact that it happened to multiple tires and on both axles, tires aired properly and cared for, you’re likely just too heavy for your tires. period. Or am I missing something?
Doing the same thing over and over again and expecting different results is the definition of something. Especially since you’re alluding to maybe 5 tires or more in less than 10 years and low miles.
Think about it. And figure out your weights.