As wheel offerings have gotten deeper over time, valve stems have gotten longer and heavier, making your expensive lightweight carbon wheels more susceptible to imbalance. Even with light valve setups like Silca’s own recent aero tubeless setup, you are still looking at least 10-20g out of whack. And while that might not seem like much, if you’ve ever come barreling down a long descent at high-speed riding a deep wheelset, you’ve probably felt that disconcerting hop of out of balance wheels. So Silca has a new solution in their SpeedBalance that combines a rim-mounted aerodynamic wheel magnet with a set of tunable weights to bring equilibrium back to your wheels. Take a closer look after the break…
The SpeedBalance joins Silca’s other Tubeless Collection offerings to get your wheels spinning fast and cheating the wind. The new aerodynamic magnet is claimed to save up to 1W at 30mph/48kph versus a traditional spoke-mounted magnet. That might help one wheel if you have a speed sensor linked to your cycling computer, but even if not balancing both wheels will result in a smoother rider, and should actually benefit handling on big descents.
For $36 the kit includes a pair of stick-on SpeedBalance pods, each with a single magnet and 4 x 2.5g tungsten slugs to custom balance your wheels against the valve stem. Plus, the kit also includes a pair of the SpeedShield Aero Valve Stem pods, that claim to smooth the airflow onto the valve stems themselves (and eliminate that horrible rattling) so you will get the maximum aero setup for your wheels.
Get them direct from Silca, or through your local bike shop.