My 2001 cardinal has a tag showing 5200 for axles. The GVWR is 12,300 10,400 does not even carry the weight. since we are keeping the 5er, should we think of going to larger axles
If your worried about your trailers 5.2k axle system being overloaded I would suggest getting them weighed regardless of opinions expressed.
Some rv trailers can be quite heavy on one side and once the trailer is loaded it can be overloaded on the tires/wheels and springs on that side. Even max or close to max loaded sitting on a level scale platform one side or the other can run overloaded especially in strong side winds.