Dunlop valve

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Dunlop valve stem

The Dunlop valve, (also called a Woods valve or an English valve) is a type of pneumatic valve stem in use - mostly on inner tubes of legacy bicycles - in some countries, such as Japan,[1] Korea, India, Pakistan, Sri Lanka, many European countries, and a number of developing countries. It has a wider base than a Presta valve, similar enough in size to a Schrader valve to use identically drilled valve holes in rims,[2] but it can be inflated with a Presta valve adapter.[3] The inner mechanism of the valve can be replaced easily, without the need for special tools.

The inventor was C. H. Woods. It superseded Dunlop's original valve for pneumatic tyres.[4]


External thread: 0.305 in (7.747 mm) x 32 TPI (132 in or 0.7938 mm pitch)

See also[edit]


  1. ^ "Japan Cycling Navigator:Information: Bikes in Japan: Tyres and Tubes". Retrieved 1 June 2009.
  2. ^ "Inner tube buying guide". 8 October 2018. Retrieved 10 October 2018.
  3. ^ Sheldon Brown. "Glossary: Woods Valve". Retrieved 1 December 2010.
  4. ^ Moulton, Dave (21 August 2007). "John Boyd Dunlop". Dave Moulton's Blog. Retrieved 9 January 2013.

External links[edit]