Well somehow on the Driver's side both my Bridgstone Duravis 500 and Michelin XPS Rib Tires have the same 342014 Build Dates despite different installation time (same year) and dealers!
The Bridgeston Duravis looks great (its slightly heavier dead weight than the XPS Rib) and still has a lot of molded "spikes" remaining on the tire sidewall.
The Michelin XPS Rib has a little sidewall age cracking and the Tread was very black compared to the dull gray sidewall so I took it to my tire dealer for an inspection and he confirmed the little cracks were superficial and did NOT want to sell me a new tire.
So next month's tow 900 miles from AL to IA to sit once again for several months or more may prove or disprove longevity....
Also, none of my Bridgestone Duravis or XPS ribs were down more than 3 lbs pressure after 9 months sitting in storage through last summer, Fall, and this winter...
But my Dually Truck rear outside Tire I tried to air up first, the Valve core failed as soon as I put the Pressure gauge on it!
Will Infrared Temp check each wheel on every travel stop and swivel my head to the mirrors every ten minutes to keep an eye on my tires - Probably should have gotten a TST system but I don't want to fool with it now...
Wish me luck!
Retired USAF
Silver 05 Dodge RAM LB CTD Dually 4Speed Auto SWD 3.73, Westin Sportsman Grill & Taillight Guards,Husky Mudguards, Retractable Ball Hitch, Onboard Air & Horns, MaxBrake - towing 2005 Keystone Montana Big Sky 3670 with Star Performance adapter