Feature:1. Rubber Material: Made of high quality rubber material, the internal structure is stable, and has strong flexibility, which can fully meet the international standard pressure.2. Longer Service Life: Off road motorcycle inner tube has higher safety performance and longer service life than ordinary inner tubes, more durable.3. Shock Absorption: The 2.75/3.00‑21 inner tube can absorb the shock of bumpy roads to adds comfort to your riding and guarantee your safety.4. Applicable Models: The 2.75/3.00‑21 inner tube has a straight valve stem and is perfectly suitable for motorcycle with 21 inner tubes.5. Replaceable Inner Tube: No need to buy a new tire when you have a flat, simply replace the damaged inner tube and you'll be back up and running.Specification:Item Type: 2.75/3.00-21 Inner TubeMaterial: RubberColor: As Pictures ShownWeight: Approx. 542g/19.1ozValve: Straight Valve Stem Package List:1 x 2.75/3.00-21 Inner TubeNote:Before installing the inner tube, check that there is no burr on the rim opening. Do not sharpen the tyre tool to avoid puncturing and prying the inner tube.