PU Sponge Tire RC Airplane Wheel Tire and Wheel Sets for RC Airplane Car Product Descriptions: 1. It’s small and easy to install in your RC airplane or RC car. 2. RC Airplane tyres are made of PU sponge, hub are made of aluminum alloy, perfect replacement. Technical Parameters: Size: 4 inch; Axle hole Diameter: 5.5mm Thickness: 30mm/1.17” ; Diameter: 100mm/3.93”; Color: Black Package Included: 1 Pcs x PU Sponge Tire Note: 1. Please pay attention to the Specification Table before purchasing, make sure our product is right what you want.