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 10" (4.10/3.50-4) size as the most commonly used wheel size for hand trucks.

• Tire size: 4.10/3.50-4 (10" nominal; wheel diameter 9-27/32")
• Tread: knobby, 80 mm (about 3-1/8") wide
• Hub: metal, with grease fitting; compare the hub position with your old wheel
• Axle: 5/8" diameter x 2" long
• Dynamic load capacity: 265 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 (4.10/3.50-4), the axle diameter and the hub length to your old wheel rather than the outside diameter alone.