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The visible outer thread of the stem holds the dust cap. The Schrader valve (also called American valve [1]) is a type of pneumatic tire valve used on virtually every motor vehicle in the world today. The original Schrader valve design was invented in 1891 and patented in the United States in 1893. [2]
A dustcap is a small cover used on the valve stem of a bicycle or car tire to prevent dust or other small particles from entering the valve and damaging it. Dustcaps are usually made from plastic but may occasionally be made of metal. The dustcap is internally threaded and is secured by screwing it onto the end of the stem.
An inflator stem is not used; instead, a removable cap on a valve stem embedded in the tire rim is fitted, with only the cap visible. When inflating the tire, the cap is first removed, typically with a coin, and then a "portable" dedicated inflator stem is screwed onto the valve stem. Through the inflator, the tire is inflated as usual.
The Presta valve (also French valve (FV) or Sclaverand valve) is a type of tire valve commonly found on high pressure bicycle inner tubes and is commonly used on tubeless setups. It consists of an outer valve stem and an inner valve body. A lock nut to secure the stem at the wheel rim and a valve cap may also be present.
In November 2019, Halfords acquired McConechy’s garages in Scotland [15] and Tyres on the Drive mobile tyre fitting service. [16] In March 2021, the business acquired Universal Tyres and Garages. [17] In December 2021, Halfords acquired rival tyres and auto-care chain National Tyres and Autocare for £62m. [18]
National Tyres and Autocare is a tyre and automotive parts retailer based in Stockport in Greater Manchester, England and owned by Halfords. They are commonly referred to as just 'National Tyres' [ 1 ] although the limited company is still National Tyre Service Ltd (trading as National Tyres and Autocare).