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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 with a valve stem, and fits inside of the casing of the tire. The inflated inner tube provides structural support and suspension, while the outer tire provides grip and protects the more fragile tube.

  1. ^ "Inner tube buying guide". Wiggle Guides. 2019-11-05. Retrieved 2020-07-10.

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