12 1/2 x 2 1/4 Bike Tires and Inner Tubes, 12.5x2.25 BMX Tire Sets 57-203 | Compatible with Jetson Kids Bike Caster Trike Bob Stroller and Other 12 Inch Bicycle Tires and Tubes

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• 【Fitment】: 12.5 x 2.25 bicycle tire and tube set also written as 57-203 bike tire set, can replace many kids bike, bmx bike, stroller, electric wheelchair which has 12-12.5 inch Outdiameter tire and 8 inch rim.
• 【Tire】: The 12.5 inch outer tires are made of rubber with up to 45 percent nylon content for greater heat and puncture resistance than faster-wearing traditional all-rubber tire materials, and the fine tread pattern is designed to drain water and resist skidding, making it ideal for normal road surfaces.
• 【Tube】: Rubber-covered AV TR13 straight valve prevents the inner tube from tearing and leaking, while the 12.5x2.25 inner tube made of full-butyl rubber provides better airtightness and vibration damping than natural rubber inner tubes for a more comfortable ride.
• 【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】: 12 1/2x2 1/4 tire & tube sets ( 57-203 tire and tube sets ) ,means the tire outdiameter is 12.5 inch and tire wide is 2.25 inch, fit 8 inch RIM, can replace 12” /12.5” bike tire. The valves are pure copper TR13 straight valves.
• 【Package】: 12.5 x 2.25 inner tube x1 and 12.5 x 2.25 bike tire x1; plastic tire pry bar x2