Why is proper wheel nut torque critical?

• A. It reduces tire pressure.
• B. It makes wheel removal easier.
• C. It ensures even clamping force, prevents wheel detachment, and avoids damage to brake discs and rims.
• D. It improves aerodynamics.

Answer: (C)

Proper wheel nut torque ensures the wheel is clamped evenly to the hub. When the nuts are tightened to the correct specification in the proper sequence, the load is shared equally across all studs, keeping the wheel firmly attached under braking forces, bumps, and turns. This prevents the wheel from loosening or detaching while the aircraft is in service and protects the mounting surfaces from uneven stress. If the torque is too low, the wheel can shift, causing vibration, uneven rotor seating, and a real risk of wheel loss. If it’s too high, studs and threads can be overstretched or damaged, and the mounting surfaces—like the brake discs and rims—can be distorted or damaged due to excessive load. Following the specified torque preserves the integrity of the wheel assembly and the braking components, ensuring safe operation. Other options describe effects that aren’t about secure retention or component protection, like altering tire pressure or aerodynamics, which aren’t the purpose of proper lug torque.