SILCA 731 Leather Piston Gasket (formerly 73.1)

74 reviews

What is it?

The 731 Leather gasket fits SILCA pumps with 28mm inner diameter.

Who's it for?

The cyclist who appreciates a long lasting tool and is looking to bring their PISTA, PISTA PLUS and VIAGGIO pump back to like-new condition.

Why We Designed It | Product Specs | Getting Started

Why We Designed It:

Since the 1960's all SILCA leather gaskets have come from the same leather converting house in the fashion district of Milan, Italy.  For more than 5 decades the same supplier has cut these washers from the excess material left over from the production of exotic handbags, Italian luxury cars interiors, and high-fashion luggage.  A small press is used to trim and pressure-form these leather washers into durable pressure gaskets.

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.




  • Fits 28mm internal diameter SILCA pumps
  • Made from finest quality full grain leather
  • Produced by hand on the same equipment continuously since 1960
  • 2.50mm thick leather
  • Hand-crafted in Milan, Italy
  • Limited Warranty

Getting Started:

For further information on the 731 Leather Washer, please visit the SILCA resource center. 


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Customer Reviews
5.0 Based on 74 Reviews
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James M.
United States United States
Pump Leather piston gasket

YouTube video instructed me how to prep the leather.

A SILCA Customer
Jamie M.
United States United States
About as simple as it gets

Talked briefly with a rep via the Silca site. Verified which piece I needed. Ordered and delivered. Pain free. Given the current state of the product in the cycling industry I couldn’t have asked for a easier process. My Pista is as good as ever. Thanks for making great products. Keep it up. -J

SILCA SILCA 731 Leather Piston Gasket (formerly 73.1) Review
Edward C.

Mr D.

Ronald R.