Serfas Bicycle Inner Tube Schrader Valve for 20-Inch Tire (20 x 1.50/2.0) FREE shipping within United States Ships worldwide Buy Online or Click & Collect Share Loading Facebook Like button... Serfas Bicycle Inner Tube Schrader Valve for 20-Inch Tire (20 x 1.50/2.0) FREE shipping within United States Ships worldwide Buy Online or Click & Collect Share Loading Facebook Like button...