Inner tube
An inner tube is an inflatable torus that forms the interior of some pneumatic tires. The tube is inflated through a valve stem and fits inside the tire casing.
An inner tube is an inflatable torus that forms the interior of some pneumatic tires. The tube is inflated through a valve stem and fits inside the tire casing.
An inner tube is an inflatable torus that forms the interior of some pneumatic tires. The tube is inflated through a valve stem and fits inside the tire casing.
Source: Wikipedia "Inner tube" · CC BY-SA 4.0
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