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Amazon.com: AR-PRO (2-Pack) 2.5/2.75-14” Replacement Dirt Bike Inner Tubes - 60/100-14” Tire Tubes for 50cc to 160cc Dirt and Pit Bikes - Compatible with Apollo RFZ, Atomik, Thumpstar, and More : Automotive
How to buy the right inner tube sizes & bike tyre valves | Cyclist
Amazon.com : Listenman 2 Pack 12" x 1.75/1.95/2.125 Bike Inner Tube with Bike Tube Repair Tool Kits, 4 Tire Levers, 6 Self-Adhesive Round Patches, 1 Metal Rasp, Replacement Schrader Valve Bicycle 12"