The "Deli Big Buddy 26"x4.0 Fat Bike Tire Tubes" are likely inner tubes designed to fit fat bike tires with a diameter of 26 inches and a width of 4.0 inches. Fat bike tires are designed to be wider than traditional bicycle tires, and they are often used for riding on sand, snow, or other soft surfaces.
Inner tubes are an essential component of a bicycle tire system. They are made from rubber and are placed inside the tire to hold the air pressure that supports the weight of the rider and the bike. Over time, inner tubes can wear out or become punctured, which can cause air leaks and flat tires. When this happens, it's important to replace the inner tube with a new one that matches the size and type of the tire.
The Deli Big Buddy 26"x4.0 Fat Bike Tire Tubes are likely made from a durable rubber material that is resistant to punctures and abrasions. They may also feature a valve that is compatible with the valve type on the wheel, which in this case may be a Schrader valve or a Presta valve. When replacing an inner tube, it's important to make sure that you get the right size and type for your tire, and to inflate it to the correct pressure as recommended by the manufacturer.
