Model designation: When we list 2 sizes in our model designation, ie. 36/37RL, we mean the inside usable floor is at least 36' and the outside is at least 37' long.
Many manufacturers often misstate their size by using a smaller number in their model designation. For example: their 35 model very often measures 38' long. The reason they do this is that most folks would like everything in a 40' fifthwheel but they really don't want to tow anything more than about 25' long. So, ad agencies and sales managers just understate the real size of their fifthwheel, calling their model by a shorter number than the actual length. We try not to mislead by stating both the inside and out dimensions as our true model designation.