Whether we prefer riding down paved roads or venturing down the beaten path, the Vision Metron 45 SL Disc Wheelset has us covered. This versatile wheelset, artisanly built entirely by hand, features a lightweight carbon fiber construction to handle anything we throw at it. Compared to the Metron 40 SL, this wheelset features optimized aero performance and power savings, increasing stability by 21% with a 4. 2-watt saving using a 25mm tire.