Les Schwab in the North West is famous for the wrong load rating. I have seen lots of pickups that people wanted a bigger tire and they would install a load range D instead of E. I would walk up to people and ask them if they knew the tires on their truck were D's and most would say no. Had friends go thru the same thing with L S. They had a F350 4x4 short bed and he wanted larger tires so they put on wild country D's. I told him that was not right and he got mad at me and said I was biased because I did not like LS. Well he left the NW and headed to So Cal with his 40' toy hauler. When he came back he apologized and said he wished he had listened to me in the first place since it was a horribly bouncy ride and the tires were nearly worn out when he came home. He went to LS and their excuse was "the D's have more load caring capacity than the Michelin E's that came on his truck". After a heated discussion they gave him a new set of the D's to use when not towing and he went back to his E's for towing.
A lower load rating is dangerous as in my example.
