True enough, I've come close with my Yanmar, and it's about 4' wide front and back, just by dropping a wheel in a hole I didn't know was there. Fortunately I only had the bucket up a foot or so. It just seems like a "triangle" would be easier to tip than a "square" with the load way out front, but you're right, on flat ground it shouldn't be a problem long as you don't hit a hole like I did..........