Inner tube 17" - 2.5, Kamelia brand. The first number is the rim seat diameter in inches, the second is the tire profile width. The inner tube holds the air inside the tire and must match the tire size. The tube fits mopeds such as the Alpha, Delta, and others.
Replace the inner tube after a puncture, if the wheel has started losing air on its own, or if cracks and cuts have appeared in the rubber. When replacing it, inspect the inner surface of the tire and the rim: a sharp object or burr will quickly puncture the new tube.
