Good decision on the Sailun tires, however they do require a 110 psi rated wheel and it is not likely your 2007 Montana has them if they are original wheels. More than likely yours are rated for 80 psi max and should be stamped on the back side of each wheel. Our 2008 Montana 3400RL had 80 psi wheels. Your Montana should be OK with a GOOD "LT" tire such as Michelin, Firestone, Bridgestone, etc. and you wouldn't have to upgrade wheels.
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2018.5 Montana 3791RD
Full Timers 9/1/2010 through 1/16/2020.
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