This tire fits for 4 inch rim hub,it means the rim outer diameter is about 4 inch(102mm)The maximum inflation pressure (PSI.): 24PSI ,4PLY Rating, Not for Highway ServiceManual Measurements Are Only for Reference):Tire Size: 410-4 410-4,Tire Outer Diameter(without -filled): 260mm (102inch),Tire Inner diameter: 102m (4inch),Tire Side width: 85mm (335inch)Usable with lawn mowers / tractors, hand trucks, wheelbarrows, garden / utility / flat carts, yard trailers, dollies, trolleys, wagons, generators, snow blowers, pressure washers, compressors, wood chippers and moreSize: 410/350-4Material:rubbercolour:blackPackage Contents:2 x Inner Tube TireOnly the above package content, other products are not included.Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.