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| ™ - Schraeder is a registered Trademark |
34 | of the Schraeder Corporation Inc. | |
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Tyre Valves
Bicycles primarily use either Schraeder™ or Presta tyre valves. To inflate tyres the pump needs to be fitted with the appropriate attachment specific to the valve stem.
The Schraeder™ valve is the most commonly used tyre valve. It is also known as the car or the American valve. Tyres fitted with Schraeder™ valves can be inflated using either a hand pump or a service station pump, as it is the same valve used on cars. Inflation involves removing the valve dust cap, then screwing or pushing on the pump connector to the end of the valve stem and inflating. By depressing the pin in the end of the valve stem the tyre can be deflated.
The Presta valve is also referred to as the French or high pressure valve. In order to inflate tyres equipped with this valve, the pump needs to have a special fitting attached to accommodate the valve’s narrower profile. The service station pump can be used if an adapter is screwed onto the valve stem. Inflation involves removing the dust cap, unscrewing the valve stem locknut, freeing the valve stem by pushing down on it, then fitting the pump head and inflating. Deflation is achieved by opening the valve stem locknut and depressing the valve stem.
Note: The valve dust cap should always be replaced in order to prevent dirt entering and damaging the valve.
Using a service station pump to inflate tyres is not encouraged as tyres may blow out if sudden over inflation occurs.
SchraederTM Valve | Presta Valve |
(Car/American) | (French) |
RAOM0507 | Apollo Bicycle Company Pty. Ltd. ABN: 60 001 914 469 | Updated 23/05/07 |