Silca SpeedBalance Kit
SpeedBalance is the world's first Aerodynamic Wheel Magnet AND tunable balancing system for high performance cycling. SpeedBalance replaces your spoke magnet with a rim mounted aerodynamic magnet that can save up to 1 watt at 30mph. 4 Tungsten slugs inside the SpeedBalance weigh 2.5 grams each allow for custom wheel balancing up to 10 grams to offset valve stem weight and create perfectly balanced wheels to eliminate high speed vibrations and improve handling.
2x SpeedBalance Pods (each pod contains 1 magnet and 4 Tungsten slugs)
2x SpeedShield Aero Valve Stem Pod
Upgrading 2 Wheels with SpeedBalance and SpeedShield will save just over 1 Watt at 30mph, slightly more savings than upgrading that same wheelset to Ceramic Bearings.
Mfr Claimed Weight
2.5g (per magnet)