The GVWR for the trailer is the total weight of the trailer as it sits on a scale. Axle weight ratings are for the sprung weight, the weight the axles are supporting. The scale weight includes the unsprung weight of the tires, wheels, brake assemblies and the axles themselves. So if the trailer scaled at 12,100 and had a pin weight of 1700, the 10400 would be the weight of the tires on the scales (sprung and unsprung), but the unsprung weight of the tires, wheels, brake assemblies and axles is probably 300 to 400 pounds (estimating) leaving the axles supporting a sprung weight of 10000 to 10100 (again an estimate).
This is an example for understanding only as I do not know the specific weights.
Glenn & Beth (Dad & Mom)
David & Audra (12 year old twins)
2006 Dodge Power Wagon (Adventure & Tow Vehicle)
2006 Rockwood 8281SS (Home away from Home)