RV tires AGE out vs wearing out cause of limited yearly mileage
Rule of thumb is 5-7 yrs for trailer tires and 7-10 yrs for MH tires.
Having tires 'professionally inspected' is always a good idea.
For me.....
I am anal about tires.
At 5 yrs (5th wheel) I replace.
I would rather get them at my leisure when most convenient then when on a trip needing tires, possible damage to rig .....hassle/added expense etc.
If I had a MH would probably increase time frame to 7 yrs vs 5 yrs for trailers due to lack of 'tire scrubbing' incurred on trailer tires when maneuvering
As suggested.......check out DOT tire date.
Those tires could be 7 yrs old now