I Bubbled a Nankang tire this trip on the right side. Load rang D, ST225R15. Temp was about 90 outside. I am away from the trailer right now but I think this is the correct size. I know the Load range D is correct. I don't know if I had a bad tire or what. Tire was like new, 2 years old and covered when not in use. Do they make a load range E trailer tire somewhere? Where I bought a new tire they didn't have one. Will check site again when I get home. Thanks Dean