Moldon wheels are a type of solid rubber with little or no tread which makes them ideal for the heaviest loads. These have higher load capacities than solid rubber wheels and aluminum is a lightweight structural metal that has proven strength. These wheels are best suited for smooth warehouse floors where they can roll easily. The defining feature of the moldon wheel is its excellent load capacity. Available in six options.6 in. Wheel/.625 Bore/Solid Hub - Hub Length = 2.375 in. - Load Capacity = 500 lbs 6 in. Wheel/.75 Bore/Solid Hub - Hub Length = 2.375 in. - Load Capacity = 500 lbs 8 in. Wheel/.75 Bore/Solid Hub - Hub Length = 2.25 in. - Load Capacity = 550 lbs 8 in. Wheel/.625 Bore/Spoke Hub - Hub Length = 1.625 in. - Load Capacity = 30 0 lbs 8 in. Wheel/.625 Bore/Solid Hub - Hub Length = 2.1875 in. - Load Capacity = 600 lbs 10 in. Wheel/.625 Bore/Solid Hub - Hub Length = 2.25 in. - Load Capacity = 600 lbsFor heavy loads on smooth surfaces order these wheels today