We do a lot of tires at the shop. Have to tell you. Michelin and Continental tires are the worst at dry rot and cracking. Funny thing is Michelin says there just surface cracks LOL.
I guess that seems pretty common with tire shops, 5-6 years, any older and the shop won't work on them for liability concerns...5 Years is what we use as per gm certified vehicles,older than that they are scrap.
BF Goodrich is owned by MichelinI wouldn't run anything longer than 5 years (at least here in Florida). I had BF Goodrich on my 6.0 Diesel F250 (bulletproofed), and within 3 years had 3 of the tires go bad (one blew out with my wife driving and wiped out the rear bed quarter).
I changed to Michelin and I swap them out minimum every 5 years.