Shepherd Hardware 9704 10-Inch Flat Free Tire, 3-Inch Sawtooth Tread, 5/8-Inch Bore Offset Axle 2-1/4-inch offset hub with ball bearings and 5/8-inch bore 3-inch wide X 10-inch diameter tire with sawtooth tread Flat free tire never requires maintenance and never goes flat 300-lb load capacity Extremely durable and can last up to ten times longer than standard air filled tires