2Pack 12 1/2 x 2 1/4 Bike Inner Tube, 12.5x2.25 Inner Tube (57-203) Compatible with Razor Dirt Bike and Caster Trike, Jetson Kids Bike, Bob Stroller and Many Other 12 Inch Bicycle Tire Tubes.

【Fitment】: The 12.5x2.25 inner tube, can replace many kids bike, bmx bike,stroller and electric wheelchair which has 12-12.5 inch Outdiameter tubes .
【Material】:The 12 1/2x2 1/4 bicycle inner tube made of butyl rubber has a better airtightness than a natural rubber inner tube, allowing for up to six months without inflation, and it also has vibration damping for a more comfortable ride.
【Valve】: Rubber-covered AV TR13 straight valve prevents the 12.5” inner tube from air leakage caused by oxidation of the valve stem and prevents tearing of the joint when the tire receives an impact.
【Valve】: This 12" inner tube is made of pure copper valve with rubber wrapped around the stem surface to isolate water vapor and air, which is not easy to oxidize and rust, and increases air tightness and resistance to bending, and can maintain sufficient air pressure for a long time.
【Size】: Outdiameter of this 12.5x2.25 stroller inner tube is 12.5 inch and it can fits 2.25 inch wide tire on 8 inch RIM. The valve is pure copper TR13 straight valve.
【Package】: 2 Pack of 12.5 x 2.25 inner tubes with rubber-covered AV TR13 straight valve.

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