This tire fits for 4 inch rim hub,it means the rim outer diameter is about 4 inch(102mm) The maximum inflation pressure (P.S.I.): 24P.S.I ,4PLY Rating, Not for Highway Service Manual Measurements Are Only for Reference):Tire Size: 4.10-4 410-4,Tire Outer Diameter(without air-filled): 260mm (10.2inch),Tire Inner diameter: 102m (4inch),Tire Side width: 85mm (3.35inch) Usable with lawn mowers / tractors, hand trucks, wheelbarrows, garden / utility / flat carts, yard trailers, dollies, trolleys, wagons, generators, snow blowers, pressure washers, air compressors, wood chippers and more Size: 4.10/3.50-4 Material:rubber colour:black Package Contents: 2 x Inner Tube Tire Only the above package content, other products are not included. Note: Light shooting 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.