IF you read thru any of the various RV/motorhome information postings, guidelines and forums about tires from long time RV'ers ~ nearly all recommend checking the tire mfg date on the tire.
Here is one article on RV tires:
They also recommend tires over 8 years old, regardless of tread depth, be replaced with new tires.
I don't know how many people follow that "rule" but it's out there.
2012 Fun Finder XT 276 Toy Hauler & Harley Davidson Ultra Classic with Condor wheel chock
2014 Dodge Ram 2500 AT 4X4 Crew Cab 6.4 L Hemi, 373 gears, tow package, Rambox option, Revolver X2 tonneau cover, Equal-I-zer anti-sway hitch.