A Madico flat-free replacement wheel from Richelieu. The tire is molded from microcellular polyurethane foam rather than holding air, so it cannot go flat from a puncture or lose pressure, and it stays usable in extreme cold. Richelieu lists the 16" (4.80/4.00-8) size as the most commonly used wheel size for wheelbarrows.

• Tire size: 4.80/4.00-8 (16" nominal; wheel diameter 15-3/4")
• Tread: diamond, 3" (77 mm) wide
• Hub: centered, metal, with grease fitting
• Axle: 5/8" diameter x 6" long
• Dynamic load capacity: 309 lb
• Recommended surfaces: asphalt, concrete, steel grating, wood planking, gravel and grass
• Other uses include compressors, log splitters and light trailers
• Not for highway use

Tip: Richelieu lists wheel diameters as nominal, so match the tire size code (4.80/4.00-8), the axle diameter and the hub length to your old wheel rather than the outside diameter alone.