How do you figure the gvwr? I'm looking at 11,000 to 12,000lbs 5er
Sorry, I was talking about the truck GVWR which should be 10,000#. The GVWR of the trailer could also come into play but I usually just go more by the dry weight then figure what I'm going to load in it.
There's quite a numbers game and lots of different ones to keep in mind. If you don't know what they all mean do some research to be sure you don't buy too much trailer. And be VERY careful living by things like "max towing" numbers that the manufacturers brag about. They are under best case scenarios - like only you in the truck with NOTHING else. Every spouse, dog, cooler and piece of firewood you set in the truck comes off that number.
Here's a start in case you don't already know it:
GVWR = Gross Vehicle Weight Rating
Assume your truck's GVWR = 10,000. Truck weighs 7000#. The 10,000 is the most it can be loaded to so that means you have 3000# of people, gear, 5th wheel pin weight, 5th wheel hitch, etc. to put on the 4 tires that make up your truck.
So, 5th wheel dry weight = 9,000# and you put 1500# of blankets, water, lawn chairs, etc. in it. So, 10,500# is the weight of the 5th. 20-25% of that will sit on the pin in your truck bed (and count towards your TRUCK's GVWR).
So, even with a 9000# dry 5th you're still putting about 2200# in the bed + a couple hundred pound hitch + a few people + some gear and you are at you truck's may payload pretty quick. The 15K max towing you mentioned is really another # altogether. That's how much the truck can pull (not carry just pull). Like I said in my first post you'll hit your payload max long before the 15K max pull comes into play (with a 5th wheel anyway since they have the heavy pin weight).