Great Tow Capacity - Bad Payload Capacity... Increase PL?

OP stated:
"So I have a 2016 Ram 2500 Megacab with the 6.7 Cummins. I love it. Great truck. It has plenty of tow capacity for us and our current trailer and possible future 5th Wheel upgrade at 16,936lbs."

I am taking this to say, the tow capacity of the OPs truck is 16,936, not the weight of the FW he is considering. A srw 3500 would struggle with a 17K FW. OPs truck may run out of tire capacity as the FW nears 14-15K.

Jerry