I have recently purchased a 990 Artic Fox, have it on a 97 Ford 350 4x4 crew cab. I am ok on the weight, (I think), need to go get weights to be sure, however I have figured that I am hauling about 5,000 lbs loaded. My issue is with the flex in the sidewall of the tire. I have searched to find a heavier load rated tire, I know this will take care of lots of the sway and road walk that comes with the top heavy load. Any suggestions.