09/09/2026
Sizing casters for a cart? Don't divide the load by four.
Floors aren't flat — three casters end up carrying everything while the fourth floats. The real math is (cart weight + max load) ÷ 3, rounded up.
A 2,180 lb cart needs 727 lbs per caster. That 660 lb caster you were about to buy? Not enough.
Worked example, capacity chart by wheel size, and the mounting specs most buyers forget:
https://hywproducts.com/blogs/resources/how-to-calculate-caster-load-rating