My workbench isn't that heavy, maybe 300-400 pounds loaded. But my ground is uneven, with a sloping bottom and an uneven slope. That means 1) I need big wheels and 2) they have to put the bench on two wheels when going up the hill. I had to leave it in the corner as it had cheap The Depot 4" rims (said to be 275# capacity) but with them it moves like a charm. I'm excited.