For information purposes:
We changed from 16" GY 614's (G) to 17.5 Sailun (H), and (Sumec aluminum wheels from Trailer Tires and Wheels). (The price of the new tires and wheels was less than the price of one GY tire.)
So far the performance has been excellent.
We had one excessive runout issue with the then (2016) (discovered during road-force balancing) new GY tires, which were replaced after going through the GY process (but did not include tax and mounting).
The RV is equipped with Titan disc brakes, shock absorbers (4) and the MorRyde SRE 4000 with X cross-brace system. We travel at maximum GVWR for the AF 5ver(16,600), routinely at 70-75 mph depending upon speed limit. We inflate to maximum CIP of 125psi.
We currently have about 7k miles with excellent performance. Subjectively, the RV "feels" much more stable while towing.
(I used the term "subjectively" to acknowledge that anecdote is not the plural of datum.)