Amazon.com : Ultraverse Bike Inner Tube for 26 X 1.75/1.95/2.10/2.125 inch Bicycle tire Sizes with Presta Valve - Rubber Tubes for Mountain and Trail, Cruisers, MTB, and All Terrain Bikes – Set
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Amazon.com : LotFancy 2 Pack 14” x1.75/1.95/2.10/2.125 Bike Tubes, Schrader Valve (32mm), 14 Inch Bike Tire Tube for Kids Bike, Plus 2 Nylon Plastic Tire Levers : Sports & Outdoors