About Silca Few brands have been more intimately connected to the last 100 years of cycling than Silca. The Italian-born brand's legacy of legendary quality has seen company's pumps being passed down through generations of professional mechanics & cycling enthusiasts
- riders who value the experience of bike maintenance & understand its performance value. Now based in the US, Silca's heirloom quality pumps have been joined by a growing selection of thoughtfully designed & stylish accessories. Speed Balance is the world's first Aerodynamic Wheel Magnet & tunable balancing system for high performance cycling. Speed Balance replaces your spoke magnet with a rim mounted aerodynamic magnet that can save up to 1 watt at 30mph. 4 Tungsten slugs inside the Speed Balance weigh 2.5 grams each allow for custom wheel balancing up to 10 grams to offset valve stem weight & create perfectly balanced wheels to eliminate high speed vibrations & improve handling. Speed Balance Kit comes with: 2x Speed Balance Pods (each pod contains 1 magnet & 4 Tungsten slugs) 2x Speed Shield Aero Valve Stem Pod Upgrading 2 Wheels with Speed Balance & Speed Shield will save just over 1 Watt at 30mph, slightly more savings than upgrading that same wheelset to Ceramic Bearings