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- Presta_valve abstract "The Presta valve (also called Sclaverand valve or French valve) is a valve commonly found in high pressure road style and some mountain bicycle inner tubes. It comprises 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.The outer valve stem is manufactured in various lengths for different applications, and has a narrower diameter (6 mm) than Dunlop and Schrader valves (8 mm). The weakest point of a bicycle rim is usually the hole for the valve stem. The smaller hole for a Presta valve makes it possible to have extremely narrow wheels while maintaining sufficient strength in the wheel. The air pressure in an inflated tire holds the inner valve body shut. A small screw and captive nut on the top of the valve body permits the valve to be screwed shut and ensure that it remains tightly closed. The nut must be unscrewed to permit airflow in either direction. This must be done before attaching a pump. The screw remains captive on the valve body even when unscrewed fully; it is tightened again after the tire is inflated and the pump removed. The valve cap protects the valve body, keeps dirt and mud out of the mechanism, and also prevents the valve from damaging the tube when it is rolled for storage, but is not necessary to prevent pressure loss. Because the rims of bicycles drilled for Presta valves cannot accommodate the wider Schrader valves, it is often the case that rims need to be drilled for such replacements. Conversely, when a Presta valve is fitted into the larger Schrader rim hole, grommets or reducers are sometimes used to take up the extra space.The standard Presta valve has an external thread. An adaptor can be fitted onto this external thread to permit the Presta valve to be connected to a pump with a Schrader chuck. The same adaptor, because of a coincidence of thread sizes, can convert a direct-fitting Schrader pump into one that can connect to flexible adaptors of either kind.".
- Presta_valve thumbnail Presta_valve_close.jpg?width=300.
- Presta_valve wikiPageID "1546136".
- Presta_valve wikiPageLength "3165".
- Presta_valve wikiPageOutDegree "13".
- Presta_valve wikiPageRevisionID "668462658".
- Presta_valve wikiPageWikiLink Bicycle.
- Presta_valve wikiPageWikiLink Category:Bicycle_parts.
- Presta_valve wikiPageWikiLink Category:Valves.
- Presta_valve wikiPageWikiLink Dunlop_valve.
- Presta_valve wikiPageWikiLink Inner_tube.
- Presta_valve wikiPageWikiLink Pressure.
- Presta_valve wikiPageWikiLink Schrader_valve.
- Presta_valve wikiPageWikiLink Tire.
- Presta_valve wikiPageWikiLink Tubeless_tire.
- Presta_valve wikiPageWikiLink Valve.
- Presta_valve wikiPageWikiLink Valve_stem.
- Presta_valve wikiPageWikiLink File:Presta_valve_close.jpg.
- Presta_valve wikiPageWikiLink File:Presta_valve_in_context.jpg.
- Presta_valve wikiPageWikiLinkText "Presta valve".
- Presta_valve wikiPageWikiLinkText "Presta".
- Presta_valve hasPhotoCollection Presta_valve.
- Presta_valve wikiPageUsesTemplate Template:Reflist.
- Presta_valve subject Category:Bicycle_parts.
- Presta_valve subject Category:Valves.
- Presta_valve hypernym Valve.
- Presta_valve type AnatomicalStructure.
- Presta_valve type Hydraulic.
- Presta_valve type Technology.
- Presta_valve comment "The Presta valve (also called Sclaverand valve or French valve) is a valve commonly found in high pressure road style and some mountain bicycle inner tubes. It comprises 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.The outer valve stem is manufactured in various lengths for different applications, and has a narrower diameter (6 mm) than Dunlop and Schrader valves (8 mm).".
- Presta_valve label "Presta valve".
- Presta_valve sameAs Presta-ventil.
- Presta_valve sameAs Sclaverandventil.
- Presta_valve sameAs Valvola_Presta.
- Presta_valve sameAs Sclaverand-Ventil.
- Presta_valve sameAs Prestaventiel.
- Presta_valve sameAs Zawór_Presta.
- Presta_valve sameAs m.0599pv.
- Presta_valve sameAs Клапан_Presta.
- Presta_valve sameAs Клапан_Presta.
- Presta_valve sameAs Q2723915.
- Presta_valve sameAs Q2723915.
- Presta_valve sameAs 法式氣門嘴.
- Presta_valve wasDerivedFrom Presta_valve?oldid=668462658.
- Presta_valve depiction Presta_valve_close.jpg.
- Presta_valve isPrimaryTopicOf Presta_valve.