Dont put up with flats, put on a Marathon flat-free tire. Mounted on a heavy-duty 6in. steel rim with a 3in. symmetrical hub and 3/4in. bearings, this tire acts like an air tire but wont let you down. Tire Type: Microcellular Polyurethane, Rim Size (in.): 13, Tire Size: 13in.Dia. x 5in.W, Bore Diameter (in.): 3/4, Bearings Included: Yes, Hub Width (in.): 5, Load Capacity (lbs.): 400, Rim Included: Yes, Grease Fittings: Yes, Tread Type: Turf Aggressive turf treads 13in.Dia. x 5in.W 400-lb. load capacity