This just happened to me.....
IMHO....Replace ALL tires. The sitting for 18 months had a lot to do with the tire blowing. Mine sat for about the time and an inner tire blew 30 miles into trip.
BTW....Auto Club would NOT change spare for an inner wheel....only outers. Makes no sense but was told that was their policy. They towed me into a local America's Tire store where I replaced all 6 with Michelin LTX M/S2. Took 3 hours before a tow truck capable of towing my 31' Class C could be dispatched
When I got home, I had all metal valve stems installed. Purchased from Tire-Man.
Any other damage? Check inside and around wheel well.
2023 GMC, 3500HD, Crew Cab, 6.6L Gas/6 Speed Auto, 4X4, Standard Bed; SRW
2011 Outback 250RS - Anniversary Edition
Equal-i-zer 10K