(FV) French Valve, or Presta Valve, also called Sclaverand Valve (SV)
700 x 23C
700 x 25C
The Presta valve, also called Sclaverand valve (SV) or French valve (FV) 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 which can structurally weaken the rim. 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 adapter can be fitted onto this external thread to permit the Presta valve to be connected to a pump with a Schrader chuck. The same adapter, because of a coincidence of thread sizes, may be able to convert a Schrader pump into one that can connect to flexible adapters of either kind.
VEE Tire Co. comes from a long lineage in the rubber industry. Its parent company, Vee Rubber, has been producing OEM automobile, motorcycle, and cycling tires since 1977 and is the leading producer of rubber performance tires in Thailand to date. VEE Tire Co. capitalizes on this resource by utilizing research and development in other tire industries, as well as the ability to quickly produce prototypes and innovative concepts for testing. As a result of our access to these valuable tools, VEE Tire Co. now offers a wide variety of compounds to ensure each tire is customized to its segment-providing unique features for advanced performance.
VEE specialty casings provide the latest in protection technology for your tire. While ensuring the longevity of your tires is important, VEE also knows that one need not sacrifice speed or performance capabilities for durability. VEE has developed a variety of outer framework for each model to maintain a lightweight feel with the highest levels of defense.
INNER TUBE SIZE
700 x 23C, 700 x 25C
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