Re: Should I change the tires
Six year old tires on the wife's van had less than 10K miles on them. Took a trip and one of them separated at highway speed. There was a warning as I could feel what felt like a wheel out of balance before it let go.
Replaced the tire along with the one on the other side (fronts). A month or so ago one of the back tires let loose on the highway (again). This time with almost no warning.
Be aware and careful if you hit the highway. My experience.
My (new driver) son drove one leg of the trip without incident on the 2nd trip. Thank goodness the tire let loose when I was driving (both times)!