That’s not a tire issue that’s a ground clearance issue. You will not be able to drive the Durango through 12-18 inches of snow, it sits too low to the ground.I will say that while Kumho work great for all season highway tires, they do not do well in deep snow. I tried to back up over my 8 inch retaining wall on the driveway and 8 more inches of snow to get to our porch so I could unload GS cookies without dragging in a ton of snow into the house and it just spun in AWD, 4-lock, and 4 low.
I might consider some mudders the next time I need tires just to see how they perform. It would be great to be able to drive through 12-18 inches of snow for winter expeditions. I have considered some Mattracks, but they have a max speed of 40mph, so I would end up installing them for a weekend when I need them and taking them off for work, which would get annoying.