Silca removable valve core extensions are a premium U.S. made valve extender that offers air-tight installation without tape or threadseal while reducing noise and vibration on the road.

The 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 or the little gaps on bike paths and sidewalks. 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. This clever solution is certainly more refined than electrical tape we sometimes employ.

Silca RVC 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. This thin film is non-adhesive so your extensions will be re-useable, but works to eliminate loosening caused by vibration or other factors.

Silca removable valve core extensions work only on tubes and tubulars with removable valve cores because you will be relocating the valve core from the tube to the extender. If you need a tube type extension for fixed, or non-removable core tubes, please check out Silca Fixed Core Valve Extensions.

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. A quick method is the sum of the valve stem length plus the valve extender length should be about 20mm more than the rim profile.