While not MH tires, I once bought Michelins from Tire Rack for my traded-in Dually Diesel. Called them and before I made the purchase, asked what the date codes were. Too old for my liking, but they searched their inventory for the newest set of 6 they had and turned out they had a 4 mos old set. Great customer service for my now traded-in-for-Motorhome, sadly-missed, Ram dually.
Les & Pam
2017 Phaeton 40QBH-All Electric-380 ISL
2016 Jeep JKUS with Ready Brute Elite towbar