Silca 242 Presta Chuck Gasket - SILCA-PU-GAS-COM-242

The Iconic Silca 24.1 gasket is the heart of the press-on Presta chuck. The current 242 gasket utilizes a high tech and very red, fully synthetic elastomer base material.

This unique bright red gasket borrows from industries which require air-tight seals in the harshest of environments. It tests to a life expectancy of more than 5x the carbon filled rubber or Buna-N materials used previously. New Two-Stage seal geometry seals on both valve stem and at the base of valve core threads resulting in a more positive seal and improved durability. The new gasket slips onto the valve stem with a satisfying 'click', while unique internal geometry actually utilizes line air pressure to compress the gasket onto the valve stem: the higher the pressure, the tighter the seal. This design is so iconic Silca has found more than 20 companies world-wide making pump heads and gaskets copied from this, but none of them can come close to the precision and technology of the Silca 242.

Specifications:

• Synthetic elastomer base material
• 5x the durability of traditional rubber
• Two-Stage sealing geometry optimized for all Presta valve stems
• Pressure amplifying dome geometry uses air pressure to clamp valve stem
• Fits all bell-shaped Silca Presta heads
• Dimensions (H x Dia.): 9 x 21 mm