Polyurethane is the only caster wheel material that spans from a 475 lb light-duty wheel to a 34,000 lb extreme-duty build — because the polyurethane tread can bond to almost any core. The core is what sets the ceiling: polyolefin for light loads, aluminum for medium, cast iron and forged steel for heavy and extreme.
The tread compound stays the same — non-marking, floor-protecting, quiet, abrasion-resistant. What changes is the core under it. A polyurethane-on-polyolefin wheel tops out near 1,000 lb; polyurethane-on-aluminum reaches ~1,500 lb; polyurethane-on-cast-iron handles several thousand; polyurethane-on-forged-steel goes to 34,000 lb. Same floor behavior, vastly different capacity — which is why polyurethane is the default recommendation across more applications than any other material.
Total your load per caster, apply a 2× safety factor, then match the core: under 1,000 lb → polyolefin core for value; 1,000–1,500 lb → aluminum core; 1,500–8,000 lb → cast iron core; above that → forged steel core. The tiles below shop polyurethane by core and capacity band.
Yes — on a forged steel core it reaches 34,000 lb per wheel. The polyurethane itself isn't the limit; the core is.
Yes — it's non-marking and floor-protective at every capacity. That's the main reason to choose it over bare metal.
Polyurethane carries far more and rolls with less resistance. Rubber is softer and quieter. For most industrial loads, polyurethane wins.
Our US-based caster engineers will match the right build to your load, floor, and application.
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