There's little to worry about with tires the last 15 years, unless there's a cut. Just don't ride thru the outer layer much. I've also used one front tire for 1930 miles that may have been 40 years old, on a 1973 bike. LOL. The rubber was hard and cracking by the bead. It only got finished off by a nail and more crumbling taking it off the rim, I barely was able to wobble it 24 miles home.
The worst crap tires ever were made about 1995 to 2005. They would dry rot crack up in 3 years, whether 300 miles or 3,000. Maybe it was mostly because the sidewall was different color texture nonsense.
Last edited by GamblerGORD53; 03-14-22 at 03:51 PM.