So you say the Goodyear 614 is a LT tire?
http://www.goodyearrvtires.com/tire-selector.aspx
READ!!!!!! WHAT GOODYEAR SAYS!!!!!!
I still will take a good LT "road tire" over an ST tire. Did not think I would have to say "road tire" as I assume most folks were smart enough not to buy mud & snow tires for there RV.
As I said our last rig had GY 614 {as you read it is made for heavy fifth wheels & trailers has a G rate 14ply at 110 psi} We were 100/150 miles from nowhere when one tire blew up & took out the valve on the other tire so we had two bad tires. Called good sam's road service. The first person they called could not get GY 614 but wanted to bring me E rated tires on rims I told him no. #2 could not get GY 614, but he had Hankook F19 750/16 14ply, G is 14 ply. I was not happy but said yes, did not know how many more people GS would call. They were great tires I put around 50,000 miles on those 2 tires & they still looked new when we traded in our rig, we worked on the road. So yes I know if you have high pressure tires you have to have high pressure rims. The 5er we now have has 17.5 low profile tires same size as 16" with H rate or 16 ply, 125 psi, we have 2 - 8,000 lb. axles.
Most tires are good tires, I will still take an LT over a ST, but if you want trouble free tires. Check your air before each trip, every morning check your tires before you take off & thump them like truckers do. There are bad tires but by far most that go bad are from low air pressure people just do not check the air pressure.