Get the GY G614's from trailertiresandwheels.com have them mounted locally. They have great prices and fresh tires.
AS for the BS about the 110# rims weigh your 4 tires and use the inflation chart for the G tire and add 5psi to what is recommended and you will be running around 80-85 psi. This is directly from GY tech support for when you are up grading the tire to a higher rating.
GY WILL PAY FOR DAMAGES!
I did the same on my last RV went from the E to GY G for 5 years and had even tread wear running at 85psi.
Your rims are probably rated at 110# anyway.
110# is a MAX pressure not what is required! Use the weight charts. I went from G to H recently and Don't run the MAX on the H.
