Firestone Farm Tractor Implement Tire Inner Tube TR 15 Rubber Valve 15" Fits 4.00-15 4.00x15 5.00-15 5.00x15 400-15 Farm Tractor Implement Tire Inner Tube Fits both 15" listed 4.00-15 5.00-15 4.00R15 5.00R15 For Bias as well as radial application