Originally Posted by sailor
I have been told (by a source with good credentials) that the trailer should be within 1 inch of level front to back. If it isn't you are transferring weight from one trailer axle to the other with the potential of overloading an axle or tires. I was surprised to learn that trailer weight is not necessarily distributed evenly between the four wheels. My trailer has a difference of 550 pounds between the heaviest and lightest loads on the wheels.
While I don't disagree with that there is a point to which you go that you do not go beyond.
You have lowered the 5th in the truck all you can and raised your 5th has high as you can by putting on some taller tires and you are now at the 5 " of bed rail of clearance there is not much left...either lower the truck or raise the 5th.
Now the first thing on many minds is EZ, I will just do an axle flip and problem solved...perhaps, BUT grasshopper you have now raised the CoG of your 5th and its already a barn door on wheels subject to side winds.
There is the possibility that when your rig was built that it was engineered to allow an axle flip without serious change in CoG, call the factory and find out before you do anything like that.
Having said that, ANYONE here every driven I 10 around the Ca-AZ border heading W to LA???? I have MANY times and the if you ignore the "High Winds" signs there is a good chance you will find your 5th laying on its side. We have the combo of high CoG and low weight to side surface as opposed to trucks hauling freight.
You can only get it so level and the shorter the 5th the more the problem is magnified. As for it being within 1 " of level, well that is optimum and if its not then as posted you will increase the weight on the rear axle set, thus more maintenance.
In most cases and even with my shorter 5th my rig is near level and well inside the envelope of performance I am comfortable with.