Just need a way for a narrow bicycle-style tire to be quickly replaced with a balloon-style tire when dealing with sand/muck. Make it out of lightweight aluminum, make it able to be disassembled for air assault or manpack, and again, keep it light.

Some of my Canadian friends have told me of pulling sledges while wearing snowshoes, with 2 Soldiers pulling the sledge with over-the-shoulder traces, while a third pushes and steers.

Tankersteve