I found out that most discount tires won't put on LT tires on a trailer placard with ST tires for their safety reasons because of liability issues.I had to take my rims in to them in the back of my pick up and buy my LT tires and have them mounted that way and I in stalled them myself. I even have a trailer that is placard with LT tires and they gave me some concerns about LT's on mine instead of ST 's My brother bought his LT tires at walmart and they would not touch the trailer. He had to take them off hiself and reinstall them himself as they would not touch his trailer.