Silca #731 Leather Piston Gasket
The heart and soul of SILCA. The 731 washer is the same washer used in all Pista pumps for 60 plus years, and is crafted from the same leather as Italian handbags and sports car interiors. From a purely functional standpoint, inexpensive o-rings are most commonly used in this application, but no o-ring can match the smooth feel and zero-stiction action of a leather gasket. It is common today to find SILCA leather gasket pumps throughout the professional peloton (especially during the spring classics) as o-ring seal pumps struggle with heat and often are unable to seal once the pump barrel is hot from inflating more than a few wheels.