aj, thanks for that explanation! I never thought about the side to side "waddle" issue -- but it makes sense that a dual axle will reduce that problem.
And I also like the point about the ground pressure -- having four tires in contact with the ground means better performance in soft conditions.
2012 Fun Finder X-139 "Boondock Style" (axle-flipped and extra insulation)
2013 Toyota Tacoma Off-Road (semi-beefy tires and components) Our trips -- pix and text About our trailer
"A journey of a thousand miles begins with a single list."