Which component is essential for proper handling during cornering?

Suspension geometry is crucial for proper handling during cornering as it influences how weight is distributed across the tires, how much body roll occurs, and how the vehicle responds to steering inputs. The design of the suspension system, including elements such as camber, caster, and toe angles, affects traction, stability, and control when a vehicle is turning. Proper suspension geometry ensures that the tires maintain optimal contact with the road surface, allowing for efficient transfer of forces between the vehicle and the road. This is especially important during cornering, where dynamic loads shift, and precise handling characteristics are needed to maintain stability and control.

The other components listed, while important for the overall performance of a vehicle, do not have the same direct impact on handling during cornering. Tire tread depth is crucial for traction, but without the appropriate suspension geometry to manage weight transfer and body dynamics, the handling may still be compromised. Brake rotor condition affects stopping power but does not directly relate to cornering functionality. Engine performance primarily influences acceleration rather than how well a vehicle handles corners. Thus, suspension geometry stands out as the key factor in ensuring proper handling during cornering.