Tires on my 40' Mountainaire are 6 years old. We were just embarking on an a 6000 mile trip, so bought on e Goodyear tire from Camping World in NH to carry as a spare. It was 1-1/2 years old. I too complained and called Goodyear. Goodyear that they have not made any new RV tires since that date because the market went to pieces, and that they have a large inventory of tires. They also said that the tires have been stored in climate controlled warehouses, and that their Glad to carry a spare, even though I did NOT have to use it.
The Dreamcatcher
Georgetown, MA
