Okay at the risk of sounding stupid, I ask this question.
I recently heard that tires actually have an expiration date?
That after X-amount of years even if the tread is good, the rubber is bad?
Can anyone clarify this for me please?

Thanks.

No "expiration date" that I've ever heard of, BUT tires seem to have a nasty habit of sidewall rot after about 5 years, treadwear notwithstanding. The sidewall compound dries and checks leading to air loss at an increasing rate, especially if you park the car with the sun on the same side every day.

I had to replace a set of Goodyear Eagles at 5 years, 6 months due to sidewall cracks, and over 50% tread left above the wear bars.

Somewhere, and this is hearsay, I think I heard that tire dealers do not like to keep tires over 5 years. Again, hearsay.

oic.. thanks

Yes, rubber can get old if not cared for...

yeah, I need a garage so I can protect my car and tires haha