Hear is a link to Greenball. They provide the Transmaster ST brand.
If you travel regularly with your RV don't use bias ply tires. RVIA does not recommend their use on any RV trailers with 14" or larger tires.
http://www.greenball.com/brands/tran...transmaster-st
NOTE: For those of you that read my tire posts you will see that the Transmaster is one of the brands that certifies their ST235/80R16 LRE at 3500# @ 80 PSI.