Silca 25.0 Presta Valve Adapter For Disc Wheels<br /><br /><p>Since Moser's hour record of 1984, SILCA has set the standard inadapting your pump head to work with the world's fastest wheels. Thislatest version is 100% US manufactured in 6066-T6 aluminum and uses ournew high-tech 252 Elastomeric internal gasket. This unique bright redgasket borrows from industries which require air-tight seals in theharshest of environments, and tests to a life expectancy of more than 5Xthe carbon filled rubber or Buna-N materials. The 252 gasket mateswith a<span> new compression head design allowing the user to tighten the gasket fit by nearly 200% by simply tightening the cap. </span>Intests with a major disc wheel manufacturer, the new SILCA Disc Adapterliterally blew away the field by posting a blow-off pressure of 393 psi,more than 3X the pressure achieved by any competing design. </p><ul> <li>Threads into any Schrader pump head</li> <li>Can only be used to inflate Presta valves</li> <li>Exclusive CompressionHead design can tighten gasket over 200% by simply tightening cap</li> <li>CompressionHead allows you to adjust fit for even the most worn presta valves.</li> <li>True no-holding disc inflation on ALL style Presta valves including threaded stems</li> <li>Full metal construction, no plastic parts to wear or fail.</li></ul>