Yes cal206 you are sure right about that; I lived in the Pacific NW, we had Les Schwab tires who dealt with mostly Farm Equipment, construction, and logging trucks, tires as well as auto tires and sold many brands. Where most of the time I bought my Motor home., truck and car tires. It was all about service, and warranty that was excellent, triple A, from superior trained personnel, free rotation, balance, air check any time. Just pull in and the service people came running out to service your rig.[ I guess that was the good old days like the 70's 80's ].
Thats the good part, now the bad part was Les Schwab home office was Prineville ,Or and only in about 4 States. . If you had a tire that was damaged , what they called road hazard guarantee, that tire if it went bad in Arizona , on your way to Florida you had to haul it round trip with you all winter and back to Washington or the closest Les Schwab Tire Store. Never happened to me, but I never bought just one tire or a set for the steering axle, because rotation kept even wear and I always bought a complete set including the tag axle. I have known Motor Home owners years ago who bought one tire at a time as they wore out or blew out, all brands have different profiles which means they differ in height ,width and tread , also early tire failure to the tire it is mated next to. It was not unusual to see three different brand names on some motor home's. Now it seems Discount Tires is pretty much nationwide for cars, but i don't know if they sell truck tires. Costco used to sell Michelin Motor Home tires but were not able to mount them.