NK WFF16O Flat-Free Wheelbarrow Tire with Ribbed Tread 6"-Inch Centered Hub 5/8"-Inch Bearings - 15.5"-Inch Tire Diameter, 4.80/4.00-8 Flat Free 5/8 Bearing, 6"-Centered Hub Made of solid polyurethane foam 4.80/ 4.00-8 Tire, 15.5"-Inch Tire Diameter 550 Load Capacity