10.5" Diameter, 10" Flat Free Hand Truck Tire, 4.10/3.50 - 4", Saw Tooth Tread, 2.25 Offset Hub, 5/8" Ball Bearings, Solid, Lightweight Polyurethane Foam Tire Mounted On Steel Rim, Provides The Bounce & Feel Of Air Tires With The Benefit Of No Flats.