I am pretty sure Montana had 7K axles on everything on 2013. But you might check the placard on the driver's side by the propane locker to be sure. Those tires are OK if you have 6K axles.
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Carl (n Susan)
There is more to life than fuel mileage.
2012 Montana 3700RL Big Sky Package towed by a 2015 Ford F350 6.7L PSD 4WD CC LWB
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