The 3Racing Cero Series Belt Tension Nut SAK-C120 is intended as a precision component for competitive Cero setups, helping to stabilise belt preload and reduce tension drift during high RPM and directional changes. Fitted to the standard Cero anchor points, it maintains alignment to protect belt teeth and improve repeatable drive feel. Use it as part of a tuned drivetrain package to minimise lap-to-lap variation.