DURO 700 X 18C/23C/25C PRESTA 48MM VALVE BICYCLE BIKE INNER TUBE.

1. Size:

   • "700" indicates the diameter of the tire in millimeters. This tube is for a standard road bike tire size.

2. Width Range:

   • "18C/23C/25C" represents the range of tire widths that the tube is designed to accommodate. This inner tube is suitable for tires with widths ranging from 18mm to 25mm.

3. Valve Type:

   • "Presta Valve" indicates the type of valve used on the inner tube. Presta valves are commonly found on road bikes and are characterized by their slender design and the need for unscrewing the top to inflate and deflate.

4. Valve Length:

   • "48mm" specifies the length of the Presta valve. This measurement is crucial to ensure that the valve is long enough to protrude through the rim and allow for easy inflation.

5. Standard Valve:

   • The term "Standard" in this context typically means that it's a regular, non-removable core Presta valve. Some Presta valves come with a removable core, which allows for easier inflation and the use of valve extenders.

When purchasing a tube for your road bike, make sure it matches the specifications of your tire size (700 x 18C/23C/25C), and the Presta valve length (48mm) is appropriate for your rim depth.