SILCA Tubeless valve stems are designed to strike a balance between weight, strength, airflow and ease of installation. We started this project out of our own frustration at the two extremes of product in the market: inexpensive, heavy brass valve stems, or uber-lightweight aluminum stems that had reputations for being problematic in the field. In classic SILCA fashion, we set out to understand the issues and develop a better solution. For SILCA Tubeless Valve Stems, we’ve chosen to keep the geometry of the finest brass valve stems, while producing them from the finest cold drawn aluminum bar rather than a hollow extruded bar. This process is less cost effective than extrusion, but allows for a higher material yield strength and more accurate machined parts. As a result, our valves weigh less than half of brass valve stems, yet are 50-200% stronger than common lightweight aluminum valve stems. We’ve paired these valves with the finest, fully CNC machined valve cores you can buy. Just looking at them, you can see the quality, from the fully machined brass pin with roll formed thread, to the spin-formed ridge (instead of crimped) that keeps the valve nut from unthreading too far. The fully machined design leaves more internal space within these valves allows for better airflow as well as making them more tolerant of sealant.
Less than half the weight of brass valve stems
50-200% Stronger than typical aluminum valve stems
SpeedShield Improves wheel aerodynamics while protecting carbon rims
Kit contains 2 Valve Stems, 2 Spherical Valve Nuts and 2 SpeedShield Rim Protectors
Spherical nut eliminates bending forces on valve stem for improved strength