2-PCS 12/12.5" Heavy Duty Bike Tubes 12/12.5x1.75/2.25(12 1/2 X 2 1/4) ETRTO 47/62-203 AV32mm Schrader Valve Inner Tubes Compatible with 12/12x1.75/1.95/2.10/2 ¼ Road/Push Kid Bike Tire Tube