VISION METRON 45 SL DISC CLINCHER/TL WHEELSET (Limited Edition)LIGHTNESS This handmade wheel features the most advanced Vision carbon technology coupled with state of the art manufacturing processes. AERODYNAMICS An ultrafast and stable aero wheel developed through extensive CFD analysis and wind tunnel testing. NEW PRS HUB SYSTEM Helical Clutch ratchet with 72T equals a 5 degree engagement angle. This ends up as 24% faster engagement than the previous Vision 6 pawl and DT 54T 6. 6 degree. The PRS increases