X2 on proper tire maintenance, my Flafstaff came with DUO radials. After 3.5 years I have run just over 18k miles! Check pressure before every trip, am finding the Nitrogen tires seem to vary a good bit on cool mornings. One thing I do that I did not see mentioned, since the tires are radials, I rotate the front axle tire to the rear axle same side every 5k miles just like my Chevy HD TV. have been watching the China bomb posts closely, will be grading to a "D" series. Am planing a long trip to the west coast hopefully soon.
Marriot2 on Wheels 2017 Flagstaff Classic 832 OKBS
2013 GMC Denali 6.6L 2500 HD DMAX w\Alison Trans
Pepper Pomeranian rescue 101 days as camping buddy
Days camped in FR, 2011 = 20, 2012 = 57, 2013 = 59
... 2014 = 39, 2015 = 52, 2016 = 68, 3 more planned