Standard Polyurethane Wheels

Standard polyurethane combines advantages of both rubber and hard plastic. Compared to rubber, polyurethane offers 3-5 times greater abrasion resistance, higher load capacity at the same diameter, and better resistance to oils and chemicals. Compared to nylon or other hard plastics, polyurethane provides floor protection, lower noise, better shock absorption, and will not damage finished flooring. Polyurethane bridges the gap between the softness of rubber and the load capacity of hard materials.

Cast iron cores provide the highest load ratings and are the standard choice for heavy industrial applications. Aluminum cores reduce wheel weight by approximately 40-50%, which lowers push/pull force and is preferred for ergonomic considerations or where total cart weight matters. Aluminum cores also resist corrosion better than iron in damp environments. If your primary concern is maximum load capacity, choose cast iron. If weight reduction and corrosion resistance matter, choose aluminum.

Standard polyurethane wheels typically outlast rubber wheels by 3-5 times under similar conditions, making them one of the best values in the caster wheel category. Actual service life depends on load, speed, floor condition, and environmental factors. In a typical warehouse or manufacturing setting running 8- to 16-hour shifts, standard polyurethane wheels commonly last 2-4 years before tread wear requires replacement.

Standard polyurethane at Shore A 90-95 performs well on smooth to moderately rough surfaces including sealed concrete, asphalt, dock plates, and expansion joints. For consistently rough terrain, outdoor surfaces, or debris-laden floors, a softer ergonomic polyurethane or a larger diameter wheel may roll more easily. Standard polyurethane will not chunk or tear on rough surfaces, but rolling resistance increases as floor roughness increases.