There was nothing wrong with the package. When we were shopping for a 5th wheel, we were looking at a max. 34 footer. We ended up with a 38 footer which exceeded the spring capacity of my truck. I mighta-coulda gone the air bag route but I was able to get all my money back on the tires and got a better deal on a dually than we ever expected, (never should've even gone looking). I'll have to admit there are times I wish I still had the SRW.
I test drove some 5th wheels, 1 with the OEM wheels/tires and 2 with the 19.5's. The difference in the stability was amazing. I think the main difference was less sidewall flex. The ability to air up to 110 psi, 17/32 tread depth and 14 ply tires were added benifits, in my opinion.
I'm no authority on this stuff but I wouldn't hesitate to run the same package again.
Thanks for the reply, I know now tht I am going in the right direction with the 19.5 wheels.