That's the reason for the DUKW central tyre inflation system.(And others).
As regards traction, I once got my WLA Harley Davidson stuck on a hillside and couldn't get it out of the situation no matter how I struggled. That was until I took a rope I had with me and wound it round the tyre passing it through the spokes. I then walked it out. I imagine that I wasn't the first to have done that with a rope.
Another trick I heard of was through a friend that had a cement truck unable to drive up his wet, slippery access lane. The driver sprinkled lime on his tyres and proceeded on his way.
David
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Hell no! I'm not that old!
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