Tires age from sunlight (UV), ozone, heat, humidity. My wife’s little-used car tires had great tread left on Michelin tires, but after six years little cracks were forming. Had to get new tires this year.
From Edmunds:
“Many automakers, including Ford, Nissan and Mercedes-Benz, tell owners to replace tires six years after their production date, regardless of tread life. Tire manufacturers such as Continental and Michelin say a tire can last up to 10 years provided you get annual tire inspections after the fifth year.“
https://www.edmunds.com/car-maintena...our-tires.html
Consider what
@
thennen
said. Recommend going to your local tire store and talk to them, have them inspect your tires. They might offer you a good deal on the spot.