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Inner tube

This article is about the tire component. For the flotation device, see Swim ring.
Two bicycle inner tubes: A larger mountain bike inner tube and a slimmer race bike tube.

An inner tube is an inflatable torus that forms the interior of some pneumatic tires.[1] The tube is inflated through a valve stem and fits inside the tire casing. The inflated inner tube provides structural support and suspension, while the outer tire offers grip and protects the more fragile tube.

  1. ^ "Inner tube buying guide". Wiggle Guides. 2019-11-05. Archived from the original on 2023-08-29. Retrieved 2020-07-10.

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