The wheels are a fundamental part of any bicycle, be it an ebike, road bike, or mountain bike. While the term “flat tire” is used, the air in a bicycle tire is actually held in a rubber tube that lies between the tire and the rim of the wheel. Using quality tubes will help prevent flat tires and hold air longer. Different types of tubes work better for different types of bikes and riding. For example, many city cruiser bikes and ebikes use tubes with Schrader valves for 26-inch tires. Road bikes use a skinnier tube for a larger-diameter wheel, and if you are riding on trails or in an urban area with debris on the roads, you might want to consider a self-sealing tube.