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Dynamic load rating is the maximum weight a caster can carry while actually rolling — as opposed to static load rating, which applies when the equipment is stationary. Dynamic ratings are typically lower than static ones.
Rolling introduces additional stress on the wheel and bearing beyond simple weight-bearing, which is why dynamic ratings run lower. Most published caster capacities are dynamic ratings, since that reflects real-world use.
Any equipment that’s loaded and moved regularly, not just parked and loaded once — which is most caster applications.
Sizing to a static rating for equipment that moves often. If a spec sheet lists both static and dynamic numbers, use the dynamic (lower) figure for real-world planning.
Why is dynamic load rating lower than static?
Rolling adds mechanical stress beyond simply supporting weight, so the safe moving capacity is generally lower than the stationary capacity.
Which rating do most product listings show?
Most caster capacity ratings quoted are dynamic (rolling) ratings, since that reflects actual use — check the spec sheet if it's not specified.
