Howdy,
Another tire thread. my guys and I must ride a lot. We don't worry about how OLD the tire is, because by 17K miles we are ready for new tires. that's about evey 18-24 months.
My suggestion, RIDE MORE, WEAR OUT DEM TYRES.
I was only concerned because I bought my 17' RGS late last year and it still had the original OEM tires from 2016. The bike only had 4,000 miles on it.