Silca 242 Gasket for Presta Chucks

Customer Reviews (3)
4.7 / 5| Write your review
£13.99 Please note this product has selling restrictions to your country. was
Manufacturer : 
SJS Cycles part number : 
Manufacturer part number : 
The iconic Silca 24.1 gasket has been updated and improved after more than 30 years in the market. The new 242 gasket utilizes a high tech and very red, fully synthetic elastomer base material rather than a carbon black filled natural rubber of previous gaskets. This unique bright red gasket borrows from industries which require air-tight seals in the harshest of environments, and 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 slip 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 you pump, the harder it grips the stem!

This design is so iconic, Silca have 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 in the new 242.

- Fully synthetic elastomer base material
- 5 Times the durability of traditional rubber materials
- New two-stage sealing geometry optimized for all Presta valve stems
- Pressure amplifying dome geometry uses air pressure to clamp valve stem
- Fits all prior Silca presta heads
- Made in USA

This gasket only works with 30.0 / 30.2 and 17-4 Stainless Presta only chucks.
Product Reviews (3)
Questions & Answers (2) Q & A
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Product Reviews (3)
Overall Product Rating 4.7 / 5
By Daz Pountain
30 Sep 2023
5 / 5
I recommend this product
Made old pump operate like new
Arrived on time and fitted perfectly
By Chris
29 Jun 2018
5 / 5
I recommend this product
ProsIt worked
Arrived on time and fitted perfectly
Fitted it and it works.
By Pedro
13 Sep 2017
4 / 5
I recommend this product
ProsPerfect fit
Fitted to my pump. It works fine but seems very expensive for what it is. Was delivered promptly by SJS cycles.
Questions & Answers (2)
Dimensions of replacement gasket please
24 Sep 2023
I have Silca track pump from 20yrs ago, black cylinder, wooden handle and brass valve. Please can you advise on dimensions of gasket do I can double check will fit. Thanks.
Thank you for your enquiry, this item has an outer diameter of 21mm & a height of 9mm. I hope this helps.
Kind Regards. JP 25/09/23
Will this 242 gasket fit the brass presta chuck SJS Cycles part number : 23399 Thanks
07 May 2018
yes, see the description:
- Fits all prior Silca presta heads