Repro polyglas tire life?

[70runner]

Running Goodyear Polyglas G70-15 reproductions on my 70rr. Tires are now about 12yrs old, though look brand new as they probably have about 3000mi. Sidewalls are good and they hold air very well. Always garaged. Opinion on whether I should replace them based on age?

 

[Jerry Hall]

I've got them on my Superbird, probably just a little over 22 years old. They no signs of dryrot or aging. Less than 5000 miles on them. I trust them more than a 7 year old radial. I have had radials blow out sitting still with less than 100 miles on them, but were between 5-9 years old. I also have a set of redlines, with a date code of 1979, that I ran up until 2 years ago.

 

[dadsbee]

Mine are 34 years old, ~4500 miles.. pulled them and bought new. Tire shop tells me they'd trust them more than the new 2024's..
Old

New..

 

[multimopes]

I have Firestone F60-15 polyglass tires on the front on my 73 for over 12 years. Didn't drive it much last year as it sat in my garage. I noted the sidewall on one of them now has a bubble. I will need to replace them come springtime! I prefer Goodyears anyway. I might go with Mickey Thompsons or Protracs or something else instead.