Originally Posted by Cumminsfan
I fail to see any draw backs from having the springs on top of the springs. 99% of all 5th wheels have the springs on top. Never hear much about spring failure. IMO it's more about how well the springs, axles and frame are built. Is there enough payload reserve so the TT's not overloaded? Overloading either setup is far more destructive than having proper spring/axle combinations. Find a TT that has over 2000lbs in reserve payload capacity and either set up should be fine.
I totally agree
I did have a tube frame 5th wheel that the spring mount were moving and had to place beams across to reinforce all the spring supports
Present heavier unit with same spring mounts has never moved while axles are 2k heavier.
But it has the heavier I beam design.
The overhung springs usually have a flat spot for the plate. My lighter spring plates were replaced due to loosening of the u-bolts that caused a center pin to break.
Just can't just change from under to over without worrying about the center pin and proper plate arrangements.
Also unbalanced tires will cause most bushing wear on lite trailers.
I have 7k axles with same nylon bushings with balanced tires and bushing wear is no problem.