Plan on picking up a new trailer Saturday but it has Good year tires on it. The dealer said he would put anything I want to replace them, of course I said Michelin xps rib. The size is 235-80R-16. My problem is looking at Michelin's I can't find the same size in the xps rib. What size is compatible with what is on the trailer now? I would like to put the 235-85R16 in load range E on it but think they may be a bit tall. Does someone have access to a conversion chart that can help out? I am afraid of Good year tires on this big of a trailer! I was a manager of a tire shop several years ago but these new sizes kind of throw me. Can someone help?