Dual Stage Device Test Requirements

In Simple Terms

F1 wheel nuts have a dual-stage design for safety. They must pass two strength tests: handling 20,000 Newtons of pulling force when completely loose, and resisting 300 Newton-meters of twisting force when partially tightened. This ensures wheels stay secure during races.

• Fully disengaged wheel nuts must withstand 20kN axial tensile force without failure
• Partially engaged wheel nuts must resist 300Nm torque in the unwinding direction
• These are mandatory safety tests that all dual-stage wheel nut designs must pass
• Testing ensures wheel retention reliability during high-speed racing conditions