If no one has caught on yet.. I will explain. I am building a RV from the ground up using all of your expertise to make this a guide for those who can learn and follow. I have acquired a 5th wheel frame that is very decent in its original construction. This in itself was a huge education and a jump from the Truck Camper world that I came from. I have torn off the old and will be rebuilding it my way...or more less your way given the best of knowledge you all can give...we will be on a journey together learning together...share what you know and we will all enjoy this conversation. Tires are a major issue and again I'm trying to make this a fun learning curve. My mistakes will be few given all of the expertise that our forum gives us...everyone is willing to jump in and this is priceless...thank you all again and come spring we will get busy...keep in touch. As far as the weight and load, I know what axles I have, I know what brakes I have, I know what suspension I have...This is where it gets fun when we can start basically from the ground up...