Why Is the SILCA Aluminum Disc Chuck Different From Every Other Chuck?

The SILCA Aluminum Disc Chuck is engineered to solve the one problem that makes disc wheel inflation frustrating: leaking under pressure. The 252 gasket, borrowed from industries that require air-tight seals in extreme environments, tests to a life expectancy more than five times longer than the carbon-filled rubber or Buna-N materials used in standard disc chucks. A new compression head design lets you tighten the gasket fit by nearly 200% with a simple twist of the cap, and in independent testing with a major disc wheel manufacturer, the SILCA Disc Adapter achieved a blow-off pressure of 393psi, more than three times higher than any competing design.

Compact and CNC-machined from aluminum with the signature bright red gasket that visually indicates proper seating. Presta valve compatible, threads into any SILCA pump hose. For riders who use disc wheels and have dealt with chucks that leak, slip, or fail to seal on the short valve stems common in carbon wheels, this is the solution. Made in the USA.