SILCA Valve Extensions: Simple, air-tight installation without tape or threadseal, while reducing noise and vibration on the road.
That dreaded valve stem 'click' has tortured many a deep-section wheel rider over the years, often only discovered after about everything else on the bike has been rebuilt and greased, valve stem 'clicking' or rattling occurs when the valve stem moves within the valve hole in the rim, generally on rougher roads. Silca uses a patent pending ribbed gasket which is compressible to both fit more tightly to the hole as well as to cushion any contact between the rim and extension when the gasket is aligned with the hole, and if the gasket is located beyond the hole, it still provides critical vibration damping which can greatly reduce noise.
SILCA presta valve extensions work by simply threading over top of an open presta valve, and work on both fixed core and removable core Presta valves. SILCA extensions solve air leakage due to poor thread fitment or to stem loosening by using both elastomeric gaskets at the interfaces as well as a thin film sealant on the thread surfaces. There is no need for Teflon tape when using SILCA valve extensions as the sealant for the thread interface is already inside the threads! This thin film seals air-tight and is non-adhesive so your extensions will be re-useable.
SILCA Presta Valve extensions work on ALL Presta valve types, but do NOT move the valve core to the top of the extension. If you are looking for extensions which move the valve core, please look at the SILCA RVC Extensions.
Note: The fitment recommendations given by SILCA in the chart below are based on standard clincher and tubular tire well depths, your rim may vary slightly. Some rims have deeper tire wells, and some tubes may use other valve lengths. To ensure proper fit, you should measure the distance from inner rim face to base of tire well. Valve stem, plus valve extension should measure 14-24mm longer than distance between rim inner valve hose and outer valve hole. Locating the gasket within the hole is ideal, however, even if the gasket is entirely located outside the rim, some noise reduction will occur due to the damping effect of the gasket.
WESTBROOK CYCLES DELIVERY NOTICE
FREE when you spend over £50.00 in a single order
Otherwise it's typically £3.99 per order
Delivery should be expected between 2-3 working days unless stated on product page.
Approximately 4-10 working days depending on country
via Parcelforce Signed Delivery (fully traceable service). Please add items to the basket to calculate delivery for desired country.
If your country isn't listed for delivery at checkout please contact us.
Delivery of Bikes
We ship all our bikes free of charge within the United Kingdom (excl. Jersey and the Channel Islands at this time) and all our bikes come pre-assembled with just a few tweaks required (Please see our Bike Build Instruction page for details of assembly required).
All our bikes undergo a safety check before being re-boxed for shipping which can during busy periods take a little longer to complete so whilst we aim to ship all our bikes within two working days of the order please allow for additional time for this process.
All our consignments irrespective of the carrier require a signature upon delivery, deliveries are typically made between 08:00 and 18:00 so please bare this in mind when choosing a delivery address.
We do try when possible to reuse packaging from our own suppliers in order to send purchased items to our customers, we ask if the packaging is still in good condition after you've received your goods then please try to use it again or recycle if not possible.