WikiPedalia is not endorsed or affiliated with the Wikimedia Foundation.
Valve Cap
From WikiPedalia
A metal or plastic screw-on cover intended to protect the innards of a tire valve from dust and other foreign matter.
Presta valves have non-removable, built-in caps, and external caps are unnecessary.These redundant caps come with Presta tubes and tubulars so that the pointy end of the valve won't puncture a spare tube or tubular while it is rolled up. There's no reason to use them in actual riding
