Dunlop valve
 | This article needs additional citations for verification. (September 2010) |
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 bicycles in many countries, including Japan,[1] Korea, India, Pakistan, Sri Lanka, most European countries, and a number of developing countries. The Dunlop valve 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 Dunlop valve used to use a tight rubber sleeve (see illustration of "original plug") which had to be forced open while pumping, but modern Dunlop valves use a different plug (core), making the valve as easy to pump as a Presta valve.
The inventor was . It superseded Dunlop's original valve for pneumatic tyres.[4]
Note that Dunlop valves are uncommon on bicycles in the USA, where either Presta or Schrader valves are seen.
Dimensions[]
External thread: 0.305 in (7.747 mm) x 32 TPI (1⁄32 in or 0.7938 mm pitch)
See also[]
References[]
- ^ "Japan Cycling Navigator:Information: Bikes in Japan: Tyres and Tubes". www.japancycling.org. Retrieved 1 June 2009.
- ^ "Inner tube buying guide". 8 October 2018. Retrieved 10 October 2018.
- ^ Sheldon Brown. "Glossary: Woods Valve". Retrieved 1 December 2010.
- ^ Moulton, Dave (21 August 2007). "John Boyd Dunlop". Dave Moulton's Blog. Retrieved 9 January 2013.
External links[]
 | This cycling-related article is a stub. You can help Wikipedia by . |
- Bicycle parts
- Air valves
- Cycling stubs